Even after 25 years, Jamie-Lynn Sigler regrets sharing a tale about James Gandolfini, her on-screen father and co-star from The Sopranos. HBO’s hit drama series, which ran from 1999 to 2007, followed Gandolfini’s Tony Soprano - a mafia boss - struggling to find a balance between his family and criminal life. Sigler played his daughter Meadow Soprano, and it was on the sets of the series where the actress formed a familial bond with her on-screen father.

It was this deep connection and trust that she thinks she betrayed by sharing a James Gandolfini anecdote in an interview.

Jamie-Lynn Sigler shared a story she regretted sharing on The Tonight Show With Jay Leno in her new book, And So It Is... A Memoir of Acceptance and Hope. Sigler claimed that she was unprepared for her late-night visit and ended up sharing a story about James Gandolfini, her reel father and co-star in The Sopranos.

“I loved and respected him. The last thing I wanted to do was make a joke at his expense. As soon as the words came out of my mouth, I wanted to take them back,” Sigler wrote in her book.

In retrospect, the 45-year-old actress said that she was taken aback when getting ready for the late-night interview since the producers kept pushing her to offer a humorous anecdote from her time on The Sopranos. The producer persisted, according to Sigler, particularly on Gandolfini and the experience of collaborating with him. She remembered one of his acting techniques while getting ready for scenes since she wanted to provide something amusing for the segment.

“Sometimes, to prepare for a scene, Jim would make these funny animal noises —­ squeals and grunts to get out of his head and into his body to prepare himself to go deep into Tony's mind,” she recalled.

Sigler later described the incident as a breach and a betrayal of Jim's trust, despite the fact that the narrative was favorably received backstage. She also said that she felt awful after the interview - angry at herself and awful for Jim (James Gandolfini). Sigler claimed that she and Gandolfini never discussed the incident before his death in June 2013, and HBO's publicity team never brought it up either.

The actress has also shared about her last meeting with the late actor just before his death.

While promoting her book, And So It Is... A Memoir of Acceptance and Hope, Jamie-Lynn Sigler exclusively told US Weekly for her recent cover story about the last time she saw James Gandolfini. The Sopranos star remembers clearly her last chat with her TV father and co-star in the show.

“We were at a casino. He looked at me, and he was like, ‘Do you need help walking?’ And I was like, ‘I’m OK right now.’ He was like, ‘All right, you tell me if you do.’ And I was like, ‘I will,'” she said.

The only person on The Sopranos crew who was aware of Sigler's multiple sclerosis diagnosis - which she would keep a secret for years - was Gandolfini. After his passing, she discovered that he had made discreet donations to MS charities. After sharing such a close bond with the actor, it was bound to make her feel terrible after sharing that intimate information about him.

Do you think Jamie-Lynn Sigler’s guilt, even after 25 years of the incident, is justified? Share your thoughts.