Katharine McPhee has no qualms with her husband David Foster’s milestone new age. While the “American Idol” alum turned 45 earlier this year, the music producer reached age 75 last Friday, and the couple celebrated over the weekend at a star-studded concert at the Hollywood Bowl.

Katharine McPhee Foster had a touching moment between her and her son captured on camera.

The couple welcomed son Rennie in 2021Katharine McPhee Foster is sharing a sweet moment with her son.On Sunday, Nov. 3, the actress, 40, posted a sweet photo of herself and her 3-year-old son Rennie on Instagram as they sat on some stairs together,

Katharine McPhee said she and husband David Foster—who each celebrated a milestone birthday in 2024—aren't focused on their ages: "We're not fighting getting older."

McPhee, who turned 40 in March, performed and spoke to PEOPLE during her husband's 75th birthday celebration at the Hollywood Bowl on Nov. 3

Pia Toscano hinted that the 'very special' performers for her wedding this November will be David Foster and Katharine McPhee. 'Might be David and Kat, but I probably shouldn't say anything,' Toscano teased to PEOPLE at Foster's 75th birthday celebration at the Hollywood Bowl on Nov.