Chrissy Metz Details The Bittersweet Experience Of Co-Writing An Episode For The Sixth & Final Season Of 'This Is Us'

The final season of This Is Us is going to be extra special for Chrissy Metz, as she revealed she's set to co-write one of the drama's last episodes!

"It's really exciting to support fellow actors and people that you love trying new things," she gushed to PEOPLE. "For me in particular, obviously, writing has been a very new venture, but I'm very excited."

The actress called the new gig a "massive deal," and she's grateful that her colleagues are around to help.

"Dan [Fogelman] is such a great mentor, and I get to write with Casey Gettinger and David Windsor, who are our writing team," she shared. "It's been really wonderful."

Season 6 will also mark the directorial debut of her onscreen husband Chris Sullivan.

"We are really close to these characters and to these stories. When the actors are writing or the actors are directing, it's nice for it all to be shared and go around," the Emmy nominee added. "Once everybody shared their desire to want to write or to direct, Dan was like, 'Yeah, absolutely.' He's just been so instrumental."

The situation is also bittersweet since the opportunity is coming during the hit NBC show's last season.

"I'll be sitting there about to put a scene up and I'm like, 'Oh, this is the last time that I might be doing this. Or the last time we're at this location,'" the star recalled. "I have to suppress those feelings because it might not be conducive to the scene."

"I want to really enjoy and relish the moments that I do have as opposed to just crying through them, so it's weird," Metz explained. "Also, I feel like it's a story that could go on forever, so part of my delusional mind is like, 'Oh, it's not really ending.' Part of me is trying to just protect myself."

Her costar Mandy Moore is just as "emotional" as she is, promising that the show's creator "has an incredible plan" for the final episodes.

"It's going to be beautiful," the "Candy" crooner insisted of the finale. "I'm glad we're able to end things on our own terms. Dan has always wanted to go six seasons, so it's great that we're going to be able to tell the story the way he wants to tell it."