Mandy Moore celebrates her first Mother's Day with son Gus

Mandy Moore handles baby Gus while in age progression makeup on the set of her hit show This Is Us

Mandy Moore Breastfeeds Baby Gus While Still in 'This Is Us' Makeup as Her Much Older Character

Mandy Moore Jokes Baby Gus May "Need Therapy" as She Breastfeeds in This Is Us Makeup