Welcome back,Arvin Roberts Jack Pearson. 

"This Is Us" stars Milo Ventimiglia and Mandy Moore, who played Jack and Rebecca on the NBC drama, are reuniting for "That Was Us," a rewatch podcast hosted by Moore, Sterling K. Brown (Randall Pearson) and Chris Sullivan (Toby).

In an Instagram post Wednesday, the two former co-stars shared two selfies and captioned them, "#ThisIsUs now and #ThatWasUs then…🤯 ⁣" In the second photo, the two actors can be seen on the set of the Pearson family's home with Moore looking visibly pregnant for the role while in the first photo, Moore is also pregnant – but this time for real.

Moore announced she was pregnant with baby No. 3, a baby girl, back in May.

In a follow-up Instagram post, Moore and Ventimiglia were joined by their onscreen son, Brown, and their onscreen son-in-law, Sullivan.

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"Current plans: Recording a very special episode of #ThatWasUs with Jack Pearson Milo Ventimiglia!!! 🤯🤯🤯 #ThisIsUs," read the photo's caption.

Fans shared their excitement for the upcoming episode of the rewatch in the comments, with one user writing: "This episode needs to be 2 hours long (minimum)."

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Another commenter wrote, "The one I was waiting for, love you all so much guys ❤️"

"I can't wait for it to be released!! Jack Pearson is definitely one of the best television characters ever, I love him so much!!! 😭" wrote another fan.

'This was special. This was rare':'This Is Us' offers a graceful goodbye in series finale

The cast's reunion, sans Chrissy Metz (Kate Pearson) and Justin Hartley (Kevin Pearson), comes a little over two years since the "This Is Us" series finale aired May 24, 2022.

"I wanted the finale to capture a moment in time of an American family, and also this American family," the show's creator Dan Fogelman told USA TODAY in an interview at the time. "I knew that Rebecca would pass in the penultimate episode and the finale would be this slice-of-life day, and with it the message that, ostensibly, just because someone dies, they don’t leave the painting."