Alexis Knapp was born on July 31, 1989 in Avonmore, Pennsylvania to the late Bradford Elwood Knapp. She has three brothers.
Knapp subsequently dated film actor Ryan Phillippe in the summer of 2010, before splitting in September 2010. After the break-up, Knapp discovered that she was pregnant, and gave birth to a daughter, Kailani Merizalde Phillippe-Knapp, on July 1, 2011. Phillippe was present during the birth.
At age 18, Knapp moved to LA. There in 2008 she hosted popular internet video series 'Project Lore', a show about the videogame 'World of Warcraft', and also worked as a model before breaking into acting. She appeared in Percy Jackson & the Olympians: The Lightning Thief as Aphrodite Girl and in Couples Retreat. In 2012, she starred in Project X as Alexis and Pitch Perfect as Stacie Conrad, the highly sex crazed Barden Bella. She is also set to star in ABC's Super Fun Night, written by and starring her Pitch Perfect co-star Rebel Wilson, and alongside another one of her Pitch Perfect co-stars, Anna Camp. Knapp also starred in the Tom Vaughan directed film So Undercover, as Taylor Jaffe. Alexis also has roles in TBS' Ground Floor, portraying Tori, a sexy party obsessed girl, who catches up on her sleep at work the next morning. Knapp was also cast in the Lifetime pilot Cinnamon Girl, before it got passed on. Knapp also stars in short film drama Wracked, as Melissa.
|2009||Couples Retreat||San Diego Dance Academy|
|2010||Percy Jackson & the Olympians: The Lightning Thief||Aphrodite Girl|
|2012||Pitch Perfect||Stacie Conrad|
|2012||So Undercover||Taylor Jaffe|
|2013||Family Guy||Episode: "Valentine's Day in Quahog"|
|2013||Super Fun Night||Clamantha||Episode: "Pilot"|