Many episodes of the American HBO comedy television series Curb Your Enthusiasm feature guest stars. While a lot of these guest appearances are in fictional roles, many celebrities appear as themselves (or fictionalized versions thereof), including actors, comedians and sportspeople.Curb Your Enthusiasm stars Larry David (co-creator of Seinfeld) as himself, with Cheryl Hines as his wife Cheryl, and Jeff Garlin as his best friend and manager Jeff. A number of the guest stars have recurring roles on the show, with some appearing especially frequently, such as Richard Lewis (himself), and Susie Essman (Susie Greene). This list contains all guest appearances on Curb that received a "Guest Star" or "Special Guest Star" billing in the closing credits of at least one episode.

Sometimes an actor might not be credited as a guest star in their first appearance, but will be in subsequent episodes. For example, Susie Essman appears as Susie in several episodes of the first season, but was not credited as a guest star until the second season. The list also contains cameo appearances by celebrities who played themselves, such as Dr. Phil McGraw in the episode "Vehicular Fellatio".

Season 1 (2000) In the first season, the characters of the show are introduced across a series of mostly isolated episodes, including recurring characters, such as Richard Lewis and Ted Danson. Jeff's wife Susie (Susie Essman) also appears in some of the episodes – however, she has only received guest star credit from season 2 onwards. Julia Louis-Dreyfus (who played Elaine in Seinfeld) also makes an appearance, along with her husband.

As themselves Guest star Known for Episode(s) Richard Lewis comedian Episode 1, "The Pants Tent"Episode 4, "The Bracelet"Episode 9, "Affirmative Action" Kathy Griffin actress, comedian Episode 1, "The Pants Tent" Ted Danson actor, husband of Mary Steenburgen Episode 2, "Ted and Mary" Mary Steenburgen actress, wife of Ted Danson Episode 2, "Ted and Mary" Julia Louis-Dreyfus actress, "Elaine" on Seinfeld Episode 6, "The Wire" Brad Hall writer, actor, husband of Julia Louis-Dreyfus Episode 6, "The Wire" Ted Harbert president of NBC Studios Episode 9, "Affirmative Action"

In fictional roles Guest star Role Episode(s) Wayne Federman Dean Weinstock Episode 6, "The Wire" Sofia Milos Richard's girlfriend Episode 1, "The Pants Tent"Episode 9, "Affirmative Action" Laraine Newman the director Episode 10, "The Group" Oscar Nunez car park attendant Episode 5, "Interior Decorator" Bob Odenkirk Gil Episode 3, "Porno Gil" Tim Bagley shoe salesman Episode 2, "Ted and Mary"

Season 2 (2001) In season two, Cheryl is tired of Larry not working, so he begins to develop a new television show, first with guest stars Jason Alexander and Julia Louis-Dreyfus (George and Elaine on Seinfeld, respectively) as themselves. However, Larry's constant social faux pas ruin all of their chances with every major television network. This season also begins a long-running tradition of Wanda Sykes appearing to chastise Larry whenever he does something seemingly (but not actually) racist. Other notable guest stars playing themselves include Rob Reiner and professional basketball player Shaquille "Shaq" O'Neal in the episode "Shaq".

As themselves Guest star Known for Episode(s) Jason Alexander actor, "George" on Seinfeld Episode 11, "The Car Salesman"Episode 12, "Thor" Richard Lewis comedian Episode 11, "The Car Salesman"Episode 15, "The Thong"Episode 18, "Shaq"Episode 19, "The Baptism" Wanda Sykes comedian Episode 12, "Thor"Episode 20, "The Massage" Julia Louis-Dreyfus actress, "Elaine" on Seinfeld Episode 14, "The Shrimp Incident"Episode 17, "The Doll"Episode 20, "The Massage" Brad Hall writer, actor, husband of Julia Louis-Dreyfus Episode 14, "The Shrimp Incident" Rob Reiner actor, director, producer Episode 15, "The Thong" Shaquille O'Neal basketball player Episode 18, "Shaq" Mike Binder creator and star of The Mind of the Married Man Episode 20, "The Massage"

In fictional roles Guest star Role Episode(s) Susie Essman Susie Greene Episode 12, "Thor"Episode 17, "The Doll" Deron McBee Thor Olson Episode 12, "Thor" Ed Asner Mr. Weiner Episode 16, "The Acupuncturist" Rita Wilson Anne Michaelson Episode 17, "The Doll" Paul Dooley Cheryl's father Episode 18, "Shaq"Doug BensonBarry’s cousinEpisode 16, “The Acupuncturist”

Season 3 (2002) In season three, Larry, along with Ted Danson and Michael York, invests in a restaurant enterprise which finally opens despite many mishaps, most of which are Larry's fault. Director Martin Scorsese appears in a short story arc, in which Larry is given a film role. The episode "The Terrorist Attack" features singer-songwriter Alanis Morissette, as well as actors Paul Reiser and Martin Short.

As themselves Guest star Known for Episode(s) Ted Danson actor Episode 21, "Chet's Shirt"Episode 23, "Club Soda and Salt"Episode 24, "The Nanny from Hell"Episode 27, "The Corpse-Sniffing Dog" Wanda Sykes comedian Episode 22, "The Benadryl Brownie"Episode 25, "The Terrorist Attack"Episode 28, "Krazee-Eyez Killa" Michael York actor Episode 21, "Chet's Shirt"Episode 24, "The Nanny from Hell"Episode 27, "The Corpse-Sniffing Dog"Episode 30, "The Grand Opening" Richard Lewis comedian Episode 22, "The Benadryl Brownie"Episode 24, "The Nanny from Hell"Episode 26, "The Special Section"Episode 30, "The Grand Opening" Joan Rivers comedian, actress Episode 22, "The Benadryl Brownie" Alanis Morissette singer-songwriter Episode 25, "The Terrorist Attack" Paul Reiser comedian, actor Episode 25, "The Terrorist Attack" Martin Short comedian, actor Episode 25, "The Terrorist Attack" Martin Scorsese film director Episode 26, "The Special Section"Episode 28, "Krazee-Eyez Killa"

As themselves, not credited as guest star Guest appearance by Known for Episodes Lou DiMaggioLou DiMaggio played himself, and was an investor for the restaurant. He was credited as "Investor." comedian, actor Episode 21, "Chet's Shirt"Episode 24, "The Nanny from Hell"Episode 27, "The Corpse-Sniffing Dog"Episode 30, "The Grand Opening"

In fictional roles Guest star Role Episode(s) Susie Essman Susie Greene Episode 22, "The Benadryl Brownie"Episode 24, "The Nanny from Hell"Episode 27, "The Corpse-Sniffing Dog"Episode 28, "Krazee-Eyez Killa"Episode 29, "Mary, Joseph and Larry"Episode 30, "The Grand Opening" Cheri Oteri Martine Episode 24, "The Nanny from Hell" Tim Kazurinsky Hugh Mellon Episode 24, "The Nanny from Hell" Shelley Berman Nat David Episode 26, "The Special Section"Episode 30, "The Grand Opening" Richard Kind Cousin Andy Episode 26, "The Special Section" Paul Dooley Cheryl's father Episode 29, "Mary, Joseph, and Larry"Episode 30, "The Grand Opening" Paul Sand Guy Bernier Episode 30, "The Grand Opening" Paul Willson Andy Portico Episode 30, "The Grand Opening" David Koechner Joseph Episode 29, "Mary, Joseph, and Larry"

Season 4 (2004) In season four, Mel Brooks casts Larry as the lead in his hit musical The Producers. Many episodes revolve around preparing for the opening night of the show, with the hour-long season finale taking place at the musical's premiere. Larry is first cast alongside Ben Stiller, who is later replaced by David Schwimmer. Both Stiller's wife, Christine Taylor, and Mel Brooks' wife, Anne Bancroft guest star during the season, the latter in one of her latest appearances before her death. Professional basketball player Muggsy Bogues appears in the episode "The Surrogate". Several cast and crew members of the real life Producers production also appear, including the musical's orchestra and ensemble.

As themselves Guest star Known for Episode(s) Mel Brooks writer and director of The Producers Episode 31, "Mel's Offer"Episode 33, "The Blind Date"Episode 37, "The Surrogate"Episode 40, "Opening Night" Ben Stiller actor Episode 31, "Mel's Offer"Episode 32, "Ben's Birthday Party"Episode 33, "The Blind Date" Christine Taylor actress, wife of Ben Stiller Episode 31, "Mel's Offer"Episode 32, "Ben's Birthday Party"Episode 33, "The Blind Date" Cady Huffman actress, "Ulla" in The Producers Episode 31, "Mel's Offer"Episode 32, "Ben's Birthday Party"Episode 33, "The Blind Date"Episode 40, "Opening Night" Richard Lewis comedian Episode 32, "Ben's Birthday Party"Episode 37, "The Surrogate" Ted Danson actor Episode 34, "The Weatherman" David Schwimmer actor Episode 35, "The 5 Wood"Episode 37, "The Surrogate"Episode 40, "Opening Night" Muggsy Bogues basketball player Episode 37, "The Surrogate" Wanda Sykes comedian Episode 37, "The Surrogate" Anne Bancroft actress, wife of Mel Brooks Episode 40, "Opening Night" Nathan Lane actor, "Max Bialystock" in The Producers Episode 40, "Opening Night" Susan Stroman director and choreographer of The Producers Episode 40, "Opening Night"

As themselves, not credited as guest star Guest appearance by Known for Episode Lewis J. Stadlen actor, "Max Bialystock" in The Producers Episode 31, "Mel's Offer" Stephen Colbert comedian, TV Host Episode 40, "Opening Night" (patron who spooks Larry after an argument outside the theater) Don Stephenson actor, "Leo Bloom" in The Producers Episode 31, "Mel's Offer" The Producers ensemble the ensemble of the musical Episode 40, "Opening Night" The Producers orchestra orchestra of the musical Episode 40, "Opening Night" Jerry SeinfeldJerry Seinfeld is in the crowd on the musical's opening night. Uncredited cameo appearance. co-creator and star of Seinfeld Episode 40, "Opening Night"

In fictional roles Guest star Role Episode(s) Philip Baker Hall Dr. Morrison Episode 31, "Mel's Offer" Paul Mazursky Norm Episode 31, "Mel's Offer"Episode 33, "The Blind Date"Episode 35, "The 5 Wood"Episode 40, "Opening Night" Susie Essman Susie Greene Episode 32, "Ben's Birthday Party"Episode 33, "The Blind Date"Episode 34, "The Weatherman"Episode 35, "The 5 Wood"Episode 38, "Wandering Bear"Episode 39, "The Survivor" Anton Yelchin Cheryl's cousin, Stewart Episode 33, "The Blind Date" Moon Zappa Haboos Episode 33, "The Blind Date" Shelley Berman Nat David Episode 34, "The Weatherman"Episode 36, "The Car Pool Lane"Episode 39, "The Survivor" Bob EinsteinBob Einstein first appeared as Marty Funkhouser in episode 34, "The Weatherman", but was not credited as guest star until his next appearance. Marty Funkhouser Episode 35, "The 5 Wood"Episode 36, "The Car Pool Lane" Saul Rubinek Dr. Saul Funkhouser Episode 34, "The Weatherman"Episode 35, "The 5 Wood" Melissa McCarthy salesperson Episode 37, "The Surrogate" Russel Means Wandering Bear Episode 38, "Wandering Bear" Paul Dooley Cheryl's father Episode 39, "The Survivor" Gina Gershon Anna Episode 39, "The Survivor" Richard Kind Cousin Andy Episode 40, "Opening Night" Yvette Nicole Brown Stewardess Episode 40, "Opening Night" Jorge Garcia drug dealer Episode 36, "The Car Pool Lane"

Season 5 (2005) In season five, Larry's friend Richard Lewis gets very ill and requires a kidney transplant. Larry is a match, but he spends the season looking for other sources of a kidney for Lewis. Also in season five, Larry suspects he may be adopted and embarks on a search to find his biological parents. Celebrities playing themselves this season include Kevin Nealon and George Lopez, as well as professional golfer Gary Player. The episode "The Smoking Jacket" is partly set at the Playboy Mansion, and Playboy founder Hugh Hefner appears. A special segment in the season finale features Dustin Hoffman and Sacha Baron Cohen as Larry's "guides".

As themselves