Photo: MANDY MOORE/instagram

When she first started filmingThis Is Ussix years ago,Mandy Moorewasn’t yet a parent. But now that she’s mom to 15-month-old Gus, she sees her onscreen alter ego, family matriarch Rebecca Pearson, a little differently.
“I’ve been so lucky to have the ultimate guide into motherhood with Rebecca,” says Moore, 38, who shares Gus with her husband, musician Taylor Goldsmith. “She’s human and fallible and I don’t agree with her choices all the time. But being a mother is always her top priority. Her family is always first.”
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Playing Rebecca, who has early-onset Alzheimer’s, has been especially rewarding for Moore.
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Chrissy Metz as Kate, Justin Hartley as Kevin, Mandy Moore as Rebecca and Sterling K. Brown as Randall in This Is Us.Ron Batzdorff/NBC

Ultimately, Moore says she’ll always be grateful to have been a part of a project that’s been so impactful — for the fans, and for herself.
“This show has been a template for how to live your life and how to have difficult conversations,” says Moore. “It’s cool to be able to hear from people how it’s affected their lives. And I know it’s changed everything for me.”
For more from Mandy Moore, pick up the latest issue ofPEOPLE, on newsstands Friday.
source: people.com