United Kingdom, June 26 -- Allison Williams wishes the Girls set had an intimacy coordinator.

The 37-year-old actress played Marnie Michaels in six seasons of Lena Dunham's hit HBO show - which ran from 2012 to 2017 - and she has admitted having someone on hand for the steamy scenes would have been "so helpful".

She told the Not Skinny But Not Fat podcast: "It would have been great, because we had so many sex scenes to prep and work through.

"It would have been so helpful to have someone who's, like, department head of sex scenes."

Allison recalled one explicit scene she shared with Ebon Moss-Bachrach - who played her character's boyfriend Desi - in season four premiere Iowa, which aired in January 2015.

She revealed that Lena and ex...