Taylor Momsen and Chace Crawford in Gossip Girl (2007)

Penn Badgley, Blake Lively, Taylor Momsen, Leighton Meester, Chace Crawford, Ed Westwick, and Nicole Fiscella in Gossip Girl (2007)

Penn Badgley, Blake Lively, Taylor Momsen, Leighton Meester, Chace Crawford, and Ed Westwick in Gossip Girl (2007)

Mel Gibson, Madeleine Stowe, Taylor Momsen, Luke Benward, and Sloane Momsen in We Were Soldiers (2002)

Cindy Lou Who and the Grinch (photo credit: Ron Batzdorf)

Cindy Lou Who rides in the sleigh with the Grinch (photo credit: Melinda Sue Gordon)

Jim Carrey and Taylor Momsen in How the Grinch Stole Christmas (2000)

Taylor Momsen in How the Grinch Stole Christmas (2000)

Taylor Momsen, The Pretty Reckless, Jamie Perkins, Ben Phillips, and Mark Damon

Taylor Momsen, The Pretty Reckless, Jamie Perkins, Ben Phillips, and Mark Damon in Conan (2010)

Taylor Momsen and Connor Paolo in Gossip Girl (2007)

Penn Badgley and Taylor Momsen in Gossip Girl (2007)

Taylor Momsen in New York, I Love You XOXO (2012)

Penn Badgley, Blake Lively, Taylor Momsen, and Connor Paolo in New York, I Love You XOXO (2012)

Taylor Momsen, Forrest Landis, and AnnaSophia Robb in Spy School (2008)

Tom Arnold, Bobcat Goldthwait, Lynn Redgrave, Howie Mandel, Taylor Momsen, and Jacob Smith in Hansel & Gretel (2002)

Kelly Rutherford, Penn Badgley, Blake Lively, Taylor Momsen, Matthew Settle, Leighton Meester, Chace Crawford, and Ed Westwick in Gossip Girl (2007)

Penn Badgley, Blake Lively, Taylor Momsen, Leighton Meester, Jessica Szohr, Chace Crawford, and Ed Westwick in Gossip Girl (2007)

Dakota Fanning, Taylor Momsen, and Jacob Smith in Hansel & Gretel (2002)