Molly Ringwald reveals the worst project she's ever worked on as she blasts 'really difficult' colleague

It seems The Secret Life of The American Teenager had more drama behind-the-scenes than on camera. 

In a shocking revelation, Molly Ringwald, 58, called the ABC Family series her 'worst' ever acting job. 

For 96 episodes, Ringwald played the mother of a teenage girl (Shailene Woodley) who becomes pregnant at age 15. 

Ringwald dropped jaws when she spilled the tea on Bravo's Watch What Happens Live, where she was asked to rank her past acting experiences on a scale of one to 10. 

When The Secret Life came up, she pulled no punches: 'The worst,' she said. 

The 80s icon stressed she loved the cast and co-star Woodley but struggled with one person in particular. 

'It was a hard,' she said. 'I love the cast, I love Shailene, there's so many people that I worked with... there was one person that was really difficult.' 

Ringwald didn't reveal who exactly the 'difficult' person was and refrained from specifying if they were an actor or worked behind the scenes. 

Yet her memory of this individual caused her to rank the show the lowest. 

'I'm not going to say who that person is,' she said, though noted they tanked the score 'down to a one.'

From 2008 to 2013, Ringwald played Anne Juergens on all five seasons of the show and earned a Teen Choice Award nomination for 'Choice TV Parental Unit.' 

In a 2009 interview with MovieWeb, she described the show as being 'well cast' when the on-screen chemistry between the actors was brought up. 

'I think there's a lot of just very charismatic actors on the show. I think all of the kids in the show are just really charming and smart and they all get along. I think that they just work really well together. I think the show is really well cast.'

Ringwald also had high words to say about the actor who played her husband, Mark Derwin, and their on-screen daughters. 

'I think we liked each other from the get-go, but I think as time goes on, obviously you get to know the person more and you get more comfortable with them. 

'I think our relationship has definitely grown and as the characters have grown, we've gotten to know each other better and it just really helps to get it even more sort of realistic. You develop little quirks together and impressions and it just makes it more realistic.' 

While the show now leaves Ringwald with a sour taste in her mouth, the actress said Pretty In Pink was one of her best movie making experiences. 

'That was pretty great,' she said. 'I'll give that a 10.'

It was Ringwald's third Hughes movie, with Andy Cohen noting they had become a 'well-oiled machine' by this point. 

'It was written for me,' she added. 'He wrote the movie for me.'