When Jimmy says he's afraid she might beat him up, Hayley admits she has accidentally injured a few stuntmen.
WATCH: Hayley tells Jimmy Kimmel about the sport that made her so tough.
Hayley Atwell on Her Father Accosting Woody Allen|Hayley talks about the time she went to a sweat lodge with her dad.|Hayley talks about the time she went to a sweat lodge with her dad and she explains how he made Woody Allen uncomfortable at a movie premiere.
WATCH: Peggy disarms a mysterious assassin in this brutal fight scene from the premiere.
"I Didn't Know They Had Spanx in the '40s"
Hayley also talked about the look of the show, which is set in 1946 after the events of Captain America: The First Avenger.
Hayley Atwell on Marvel's Agent Carter|Hayley talks about her show “Agent Carter.”|Hayley talks about her show “Agent Carter” and she demonstrates her special talent.
WATCH: Hayley tells Jimmy about the strange thing she did while dressed in Peggy Carter's wardrobe.
Peggy's Poison Kiss|When Peggy goes undercover, a kiss proves dangerous for Spider Raymond.|When Peggy goes undercover, a kiss proves dangerous for Spider Raymond. From the Marvel's Agent Carter premiere.
WATCH: Peggy goes undercover with to-die-for red lips and Veronica Lake locks.
Get hooked on Marvel's Agent Carter! Tune in TUESDAYS 9|8c on ABC.