2000s
She was cast as Jenna Avid on Baywatch Hawaii, playing the role from 2000 to 2001. She played Jennifer in the 1970s period film Sunset Strip (2000). Allen guest starred on The X-Files and 18 Wheels of Justice. From 2000 to 2001, she had a recurring role as Kristy Hopkins on CSI: Crime Scene Investigation.
In 2001, Allen made guest appearances on Arliss, Spin City, Charmed, and Inside Schwartz. She starred as Meg Peters in the comedy film Totally Blonde. Allen appeared in the television film Face Value, written by and co-starring Scott Baio. In 2002, she guest starred on Friends, Glory Days, Mutant X, and Smallville. Allen had a small role in the film Confessions of a Dangerous Mind, directed by and co-starring with George Clooney.
Allen played Stacy in the comedy film Anger Management (2003), co-starring with Adam Sandler. She appeared as Holographic Woman in the action film Paycheck (2003), co-starring with Ben Affleck. Allen had guest starring roles on Fastlane, Andromeda, Just Shoot Me!, Frasier, Two and a Half Men, and The Lyon's Den.
She starred as Tiara Benedette in the comedy film Shut Up and Kiss Me (2004). Allen played Maddy in the comedy film Tony n' Tina's Wedding, co-starring with Mila Kunis. She also starred as Lucinda in the film Meet Market. She made a guest appearance on I'm with Her.
In 2005, Allen guest starred on Monk and Jake in Progress. She had a regular role as Laurie Payne on the Fox series Head Cases, which was cancelled after only a few episodes. She appeared as herself in six episodes of the HBO reality show Project Greenlight. The series focused on the making of the horror film Feast, which Allen had a role in. She starred as herself on HBO's Unscripted, an improvised series about struggling actors, produced by George Clooney and Steven Soderbergh. Allen was featured in Maxim magazine's Girls of Maxim gallery, and was named number 70 on the Maxim "Hot 100 of 2005" list.
Allen guest starred on Freddie and Out of Practice in 2006. She appeared in the music video for "A Little Too Late", by country singer Toby Keith. From 2006 to 2007, Allen had a recurring role as Bridget Keller, a love interest for the title character, on the ABC series What About Brian.
In 2007, Allen starred in the films The Third Nail and All Along. She was cast in Business Class, a pilot for NBC that wasn't picked up. She appeared in the ABC reality television series Fast Cars and Superstars: The Gillette Young Guns Celebrity Race, featuring a dozen celebrities in a stock-car racing competition. In the first round, she matched up against skateboarder Tony Hawk and rodeo champion Ty Murray.
Allen guest starred on Cashmere Mafia in 2008. She also had a recurring role as Eve on The Starter Wife. In 2009, Allen had a recurring role as Dana Whatley on Dirty Sexy Money. She played Waymar in the science fiction film Alien Presence. She played Jessica in the family film Shannon's Rainbow (also titled Amazing Racer). Allen starred as Dr. Andrea Swanson in the science fiction film Silent Venom, co-starring with Luke Perry. She also starred as Samantha in the horror film The Final Destination. Allen appeared as herself on the reality show Denise Richards: It's Complicated. She had a recurring role as Julia Rist on The Philanthropist.
