While in high school, she traveled to New York City on her days off and began modeling there and in Philadelphia.She signed with the Elite Model Management agency and then with Wilhelmina Models.Ritter had a number of guest starring roles on television, and appeared on the second season of Veronica Mars, playing Gia Goodman, the daughter of mayor Woody Goodman (Steve Guttenberg).Ritter guest-starred on Gilmore Girls for eight episodes from 2006 to 2007 as Rory Gilmore's friend, Lucy.Ritter spent three months shooting She's Out of My League in Pittsburgh in 2008.She played Patty, the cynical best friend of Alice Eve's character Molly.In 2008, she had supporting roles in the romantic comedies What Happens in Vegas and 27 Dresses.She co-starred in the 2009 film Confessions of a Shopaholic as Suze, the best friend of Isla Fisher's character.
Within the context of Marvel's shared universe, Jones is a former superhero who becomes the owner and sole employee of Alias Private Investigations.
She also played the first iteration of Allison Stark on the Fox sitcom 'Til Death (which eventually had four actresses play that role through its run).
Ritter continued working in film, often cast as the best friend of the lead character.
Alias ran for 28 issues before ending in 2004, while The Pulse ran for 14 issues from April 2004 to May 2006. She became a member of the New Avengers, alongside her husband, Luke Cage, during Marvel's 2010 Heroic Age campaign.
She has used various aliases throughout her history, including Jewel, Knightress, and Power Woman.