The actress, 37, has found herself in a firestorm of criticism over the past decade after she not only spoke out against two of her most successful projects: Knocked Up and Grey's Anatomy.
In a new interview on SiriusXM's The Howard Stern Show on Tuesday, Heigl not only clarifies and apologizes for her comments about Knocked Up and Grey's Anatomy, but also opens up about being labelled "difficult" in Hollywood.
"It was dumb," Heigl said of labeling the film "a little sexist" during an interview with Vanity Fair. "I liked the movie a lot. I just didn't like me. She was kind of like, she was so judgmental and kind of uptight and controlling and all these things and I really went with it while we were doing it, and a lot of it, Judd allows everyone to be very free and improvise and whatever and afterwards, I was like, 'Why is that where I went with this? What an a--hole she is!' "
She said she regrets not personally reaching out to director Judd Apatow and co-star Seth Rogen to apologize after the comments made headlines.
"I did it publicly instead and kind of tried to say, look, this was not what I meant and this was an incredible experience for me and they were incredibly good to me on this movie, so I did not mean to s--- on them at all. I've thought about like, writing a note. I feel embarrassed. I don't want it to feel insincere on any level."
"I didn't feel good about my performance," she explained of her reasoning for not submitting her name to be considered in the 2008 awards ceremony. "There was a part of me that thought, because I had won the year before, that I needed juicy, dramatic, emotional material and I just didn't have that that season."
After realizing that her comments might have offended the writers on the show, Heigl said she went to speak with the show's creator and head writer Shonda Rhimes.
"I went in 'cause I was really embarrassed," she told Stern. "So I went in to Shonda and said, 'I'm so sorry. That wasn't cool. I should not have said that' ... I shouldn't have said anything publicly, but at the time, I didn't think anybody would notice. I didn't know that journalists would see who submitted and who didn't. I just quietly didn't submit and then it became a story and then I felt I was obligated to make my statement and 'shut up, Katie.'"