Nudity these days is considered art. And if you're looking to take your acting to the next level, and possibly get a nod from your fellow peers at the Academy, then you had better consider doing an artsy scene that doesn't involve your clothes. Here are 22 movie stars in roles you might not have known:

Salma Hayek in "Ask The Dust" (2006)

Ewan McGregor in "Trainspotting" (1996)

Teri Hatcher in "Heaven's Prisoners" (1996)

Sarah Silverman in "Take This Waltz" (2011)

Reese Witherspoon in "Wild" (2014)

Tom Hardy in "Bronson" (2008)

Angelina Jolie and Elizabeth Mitchell in "Gia" (1998)

Sandra Bullock in "The Proposal" (2009)

Anne Hathaway in "Love And Other Drugs" (2010)

Robert De Niro and Gerard Depardieu in "Novecento" (1976)

Lucy Liu in "Flypaper" (1999)

Ursula Andress in "The Sensuous Nurse" (1975)

Viggo Mortensen in "The Indian Runner" (1991)

Amber Heard in "The Informers" (2008)

Helen Miren in "Excalibur" (1981)

Heather Graham in "Boogie Nights" (1997)

Shia LaBeouf in "Charlie Countryman" (2013)

Olivia Wilde in "Alpha Dog" (2006)

Denise Richards in "Wild Things" (1998)

Scarlett Johansson in "Under The Skin" (2013)

Bridget Fonda in "Single White Female" (1992)

Jennifer Connely in "The Hot Spot" (1990)