In the new HBO comedy series Life's Too Short, English actor Warwick Davis portrays himself in a role that is described as depicting "the life of a showbiz dwarf." The show centers on Davis, the diminuitive star of Willow and the Leprechaun series, as he attempts to make a comeback, and it's chock full of cameos from other actors like Johnny Depp and Liam Neeson portraying versions of themselves as well. Co-creator and recurring cast member Ricky Gervais has said that Davis is playing a twisted version of himself, and that on-screen Davis is "quite conceited and arrogant and manipulative," unlike the real Davis.

Actors portraying and lampooning themselves in television and movies is nothing new, of course, but how often are they actually keeping it real on screen? To answer this question, and to honor of the U.S. premiere of Life's Too Short this Saturday at 10:30 p.m., we took a look at a few actors who have played themselves on-screen, and weighed on on how little acting we think they're doing.

Written by Tanya Ghahremani (@tanyaghahremani)

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