Lively also wrote about the "painful" film industry in her heartfelt tribute to her former costar Blake Lively is encouraging others to "hold those you love" close in the wake of her Gossip Girl costar Michelle Trachtenberg's sudden death at age 39 on Feb.

Lively remembered Trachtenberg as someone who "laughed the fullest at someone's joke" and "faced authority head on when she felt something was wrong."

Blake Lively broke her social media silence on Wednesday to pay tribute to her late “Gossip Girl” co-star Michelle Trachtenberg, who died Wednesday morning at 39. In an Instagram Story, Lively remembered Trachtenberg as a “fiercly loyal” and “kind person, through and through.”