Mandy Moore Revisits First Days On 'This Is Us' Set Ahead Of Show's Finale Season [PHOTOS]

Mandy Moore revisited her first days on the "This Is Us" set in the last five seasons ahead of the finale season's premiere.

Moore, 37, and the rest of the "This Is Us" cast members return tonight for the premiere of the final season. The singer-actress marked the event by sharing various photos taken from her first days on the set of the previous seasons on Instagram.

"Looking back at my first days on set of every season of #ThisIsUs," she wrote in the caption. "Love that it’s always with @miloanthonyventimiglia (plus a cameo with @sterlingkbrown)!! Gonna miss these days with the fam when it’s all over, but for now, we get to come together (virtually, of course) and watch the premiere ep tonight!!!"

In the series, Moore and Milo Ventimiglia portray Jack and Rebecca Pearson. So, they are always together on the set.

Ventimiglia quickly responded to Moore's post. Several fans also praised their family on the show and shared how the Pearsons touched their lives.

"We’ve truly had a journey together @mandymooremm Cherish every moment," Ventimiglia wrote.

"Obsessed with this fam," NBC commented.

"IM CRYING you guys will always be my family and as bittersweet as this beginning of the end is, I’m so grateful for all the memories this show has given me and I cannot wait for the last 18 episodes so much love for the Pearsons always," one fan wrote.

"Not sure how time flew by and this day is actually here!!! I genuinely can't believe this is the beginning of the end. You guys had the biggest impact on my life and I will forever be grateful for everything this show has led me to. Thank you for everything. Love you forever!!!" another supporter added.

"This Is Us" creator Dan Fogelman previously spoke about the season finale. According to him, it will be a "simple ending" that will close the "final chapter" of the family saga.

"My hope is that by the end of the series, there is no stone left unturned," he told Entertainment Weekly. "You would have nothing left to ask me about spoilers. You might want to call me and say, 'I don't like what happened to such-and-such. I don't like who such-and-such wound up with.' But you won't be going, 'Who?' If we've done that, I feel like we've done our job, and we've made the choices that we thought were best for the characters and for the story."

"This Is Us" Season 6 premieres on Jan. 4 at 9 p.m. E.T.