Minka Kelly says she and 'Friday Night Lights' costar Taylor Kitsch had a 'toxic' relationship while filming the show

• "Friday Night Lights" star Minka Kelly is opening up about her past relationship with Taylor Kitsch.
• In Kelly's new memoir "Tell Me Everything," she says that she and Kitsch had a "toxic" relationship.

Minka Kelly opened up about her past relationship with former "Friday Night Lights" costar Taylor Kitsch in her new memoir "Tell Me Everything."

According to the Daily Beast's Kyndall Cunningham, Kelly wrote that she inadvertently alienated herself from the rest of the cast by focusing too much on her relationship with Kitsch. Kelly played cheerleader Lyla Garrity on the show, while Kitsch played football player Tim Riggins.

"All the effort I might have invested in connecting consistently with the girls on the show went to Taylor. So when my relationship with Taylor became toxic, I had no one to turn to," Kelly wrote in the memoir, out May 2, per the Daily Beast.

The "Euphoria" star also revealed that her relationship with Kitsch was on-again, off-again, and that neither one of them were mature enough to deal with the awkwardness on set whenever they broke up yet again.

"We were young and had very few tools to handle our emotions and personal grievances," Kelly, now 42, wrote, according to the Daily Beast. "On the days we had to work together and were broken up, he didn't want to be in the hair and makeup trailer at the same time I was."

Kitsch was 25 and Kelly was 26 during the first season of "Friday Night Lights."

The actor even divulged that Kitsch ended up receiving more support from their castmates following a breakup than she did.

"I'd show up to work with a smile on my face thinking I was being professional, while everyone else felt sorry for the guy whose heart had just been broken. My co-workers weren't taking me out for drinks after work to mend my broken heart; they were taking him out," Kelly wrote, per the Daily Beast.

Kelly and Kitsch starred on the first three seasons of hit NBC drama together. "Friday Night Lights" ran from 2006 to 2011.

A representative for Kitsch didn't immediately respond to Insider's request for comment.