Meryl Streep played a fun game of kiss and tell on Thursday's episode of 'Ellen.' (PHOTO: Screen Capture / The Ellen DeGeneres Show / Warner Bros.)

Meryl Streep has kissed a lot of people -- on screen.

There's Pierce Brosnan in Mamma Mia! (2008), Stanley Tucci in Julie & Julia (2009), Bruce Willis in Death Becomes Her (1992) and a slew of others in Streep's 30-plus years of acting.

On Thursday, Streep, 62, stopped by The Ellen DeGeneres Show to promote her latest film, The Iron Lady, a biopic of the former British Prime Minister Margaret Thatcher.

During the segment, Streep also took part in a hilarious kiss and tell game, where she was shown only the lips of her past co-stars.

I have no idea . . . is that George Clooney? I never kissed him, Streep professes after seeing the first set of lips.

Maybe you have, DeGeneres says, before revealing that the lips belong to Alec Baldwin.

The game goes on to reveal the lips of Clint Eastwood (The Bridges of Madison County), Albert Brooks (Defending Your Life), Emma Thompson (Angels in America) and even Sandra Bullock, who locked lips with Streep at the 2010 Critics Choice Movie Awards.

Fun and games aside, Streep also revealed that she didn't keep a penny of the $1 million paycheck from The Iron Lady, which opens nationwide on Friday.

But I gave it away, I gave it to the National Women's History Museum that we're trying to raise money to build on the mall in Washington, because we think that women's history needs to be told, she explained.

At the moment, the National Women's History Museum is exclusively a virtual museum.

Streep, a two-time Academy Award winner and a 2011 recipient of the Kennedy Center Honor, is up for multiple prizes for her role as Thatcher in The Iron Lady, including the Golden Globe Award for Best Actress in a Motion Picture Drama, The London Critics Circle Film Award for Best Actress and the Screen Actors Guild Award for Female Actor in a Leading Role. She's also expected to receive a Best Actress nod from The Academy of Motion Picture Arts & Sciences (nominations will be revealed on Jan. 24).

On Thursday night, Streep lost the Critics' Choice Award for Best Actress to Viola Davis (The Help).

The Iron Lady opens in theaters on Friday.

Scroll down below to watch Streep's kiss and tell game on The Ellen DeGeneres Show.