Watson, who plays Beth Pearson on the show, shared a photo of a script for the season's sixth episode, which she co-wrote with Eboni Freeman. The episode will be part two of the Beth-focused standalone episode from season 3, "Our Little Island Girl."
"Today baby takes her 1st steps. Episode 606 starts filming today," the actress captioned the post. "Couldn't have done this without my fabulous co parent @ebonifreeman who also wrote 'Our Little Island Girl' part 1. She is Queen."
Watson also gave "the biggest shout out" to series creator Dan Fogelman, whom she credited for giving her the opportunity to co-write the episode.
"And the biggest shout out to Sir Daniel Fogelman who called me up and said, 'I know you wanna write ... wanna write this episode?' " she shared. "I meannnn. Dan, no words, only emojis 🙌🏽💯🙌🏽💯☝🏽💯!"
Watson received support messages from fans and friends alike, including members of her work-family from This Is Us. Chrissy Metz, who is also co-writing an episode for the season, responded to the post by writing, "Ahhh!"
Filming on the show's sixth season began in September, with members of the cast and creative team taking to social media to commemorate kick-starting production on the final 16 episodes of the NBC drama.
"Mom and Dad. Day 1, season 6 in the can. Here we go….," Mandy Moore captioned her on-set Instagram photo with co-star Milo Ventimiglia.