Sara Foster Sets Record Straight on Dad David's 35-Year Marriage

When you’re the child of a high-profile musician, your family’s dynamics tend to become public property. That’s exactly what Sara Foster found herself navigating during a recent appearance on Kristin Cavallari’s“Let’s Be Honest”podcast, where the 45-year-old daughter of legendary music producer David Foster decided to address the elephant in the room: her father’s 35-year age gap with his wife, Katharine McPhee.

Foster, 76, married McPhee, 42, in 2019—a union that sparked immediate speculation and criticism from corners of the internet that seemed deeply invested in their personal decisions. Seven years into their marriage, they share a son named Rennie, 5, and apparently, they’re thriving. But you wouldn’t know that from the noise.

Sara’s take? She’s not interested in the outrage.“They’re 12 years in, and they are happy,”she said on the podcast. More pointedly, she reminded critics that McPhee isn’t some starry-eyed kid—she’s a fully consenting woman in her 40s who made a deliberate choice. It’s a straightforward argument, but one that clearly needed saying, given how often age-gap relationships become fodder for public judgment rather than personal celebration.

What’s interesting is how Sara framed her stepmom not as a traditional maternal figure, but rather as a sister figure—which, given they’re separated by roughly 20 years, makes total sense. She even credited McPhee with threading an incredibly difficult needle: being present as a stepparent while respecting the established family structure and the biological mothers involved.“I think it’s a tough balance, and I think she does it really well,”Sara said.

The broader story here isn’t really about the age gap itself. It’s about a family choosing to define itself on its own terms rather than through the lens of public perception. David Foster has six children from various relationships spanning decades. He welcomed his oldest daughter, Allison, 56, at age 20, and later had children with subsequent partners. With Rennie, he fathered a child at 72. When questioned about that timing in 2021, David offered a philosophical response: he may not be around for all of Rennie’s milestones, but he can offer wisdom earned over seven decades. Fair point.

The real takeaway from Sara’s podcast appearance is refreshingly simple: happy families come in all configurations, age gaps included. The Fosters appear to have built something solid, and maybe that’s worth more than the endless commentary.