2005–2010: Early career

Giddish portrayed Diana Henry on soap opera All My Children from 2005 to 2007.^{[citation needed]} In July 2007, it was confirmed by Soap Opera Weekly magazine that Giddish and All My Children parted ways in a mutual decision and that she would make her final appearance as Di on September 19, 2007. Giddish appeared in the thriller film Death in Love (2008), which premiered at the Sundance Film Festival and played the role of Courtney in the web series The Burg, credited as the first scripted webseries online. The same people responsible for The Burg also created All's Faire, in which Giddish played the role of Cindy.

Giddish, Nicholas Bishop, and Ravi Patel were cast in Fox's reincarnation drama pilot Past Life. The WBTV-produced project revolved around past-life investigators. Giddish played a Ph.D. in psychology and cognitive research who believes in reincarnation.^[6] It was announced on May 18, 2009, that Fox had ordered Past Life to series, airing midseason 2010 at 9:00 PM EST on Tuesdays.^[7] It premiered on February 9, 2010, and was canceled on February 18.

Giddish starred as the central character, U.S. Marshal Annie Frost, in the police procedural drama Chase, which premiered on NBC in fall 2010.^[8] Giddish received rave reviews for her ability to play the lead character in the series, but it was pulled in early February 2011. On April 6, 2011, NBC decided to air five new episodes of Chase on Saturday nights with the first beginning on April 23, 2011.^[9]

2011–2024: Law & Order: Special Victims Unit

In January 2007, Giddish guest starred on Law & Order: Special Victims Unit in the episode "Outsider" as rape victim Kara Bawson.

It was announced on June 27, 2011, that Giddish would join the cast of Law & Order: Special Victims Unit for its thirteenth season along with Cold Case's Danny Pino coinciding with Christopher Meloni's departure from the series.^[10] Giddish told TV Guide during summer filming, "Everybody on the set is really excited and energized. They've lost a family member with Chris Meloni leaving, but they've been very accepting of us. Amanda is thrilled to be here working with these people, and so am I."^[11]

Giddish made her debut as Detective Amanda Rollins in the 13th-season premiere, "Scorched Earth", in which the character first works alongside Detective Olivia Benson (Mariska Hargitay). In an interview with TV Guide, Giddish said about her character, "My character is in complete awe of Olivia, Amanda's really eager to get in there because she knows her stuff and really eager to learn. She has come from Atlanta and there was a ceiling there, so she's come up to New York." Giddish felt great about joining the series in its 13th season, "I couldn't feel better about it. ... There's no intimidation, what attracted me was the prospect of re-invigorating a franchise that's been so well-known and so well-liked, and then to be the shaker and mover." Giddish expressed confidence that viewers would warm up to Rollins and another new character, Nick Amaro (Pino), with time. "They're going to love us because it's not being forced in their faces," she says. "The more you know about us and the more you see us in your living room, the more you're hopefully going to love us."^[12]

At the end of Season 13 of Law & Order: SVU, she weighed in on her first season, and she said she and Pino received not only a "very warm welcome" from SVU's cast and crew, but saw their respective characters explored more than they could hope for in their first season. "They've given me a lot to work with — and I hope they give me more next season," says Giddish. "We're still playing 'musical chairs' in terms of partners, and that's a great way to go about exploring the different characters."^[13]

Giddish's castmate Ice-T, who has portrayed Detective Odafin Tutuola since the show's second season, praised both Giddish and Pino in the wake of Meloni's departure: "We had to regroup, like a football team," said Ice-T. "The quarterback changed, but we still had to move the ball down the field. And we did well... Danny came in, strong. Kelli came in, strong. And we shut down the doubters."^[13] On April 16, 2020, Giddish's character was promoted to 2nd grade class detective, in "Solving for the Unknowns".^[14]

Giddish's final episode as a regular cast member was season 24, episode 9 ("And a Trauma in a Pear Tree") in which Rollins married ADA Dominick Carisi Jr. (Peter Scanavino) and resigned from the Special Victims Unit to accept an offer to teach at Fordham University. She returned as a special guest star in season 24, episode 22 ("All Pain Is One Malady"), and season 25, episode 1 ("Tunnel Blind").

Film

Television