5 Years On: Inside Katharine McPhee And David Foster’s London Wedding, The Zac Posen Gown, And Their Marriage Secrets

The enduring romance between singer Katharine McPhee and legendary music producer David Foster continues to fascinate the public, especially as they celebrated a major marriage milestone in 2024. Their 2019 London wedding was a star-studded, intimate affair that capped off a relationship that began with an *American Idol* mentorship and blossomed into a surprising love story, bridging a 35-year age gap.

As of December 2025, the couple is thriving, frequently addressing the curiosity surrounding their union, their son Rennie, and the secrets to their lasting partnership. We dive into the specific, fresh details of their lavish London nuptials—from the custom Zac Posen gown to the historic venue—and explore the latest on their dynamic marriage in its fifth year.

The Complete Profile: Katharine McPhee and David Foster's Biographies

The foundation of this high-profile marriage is built on two highly successful, yet vastly different, career paths. Understanding their individual histories provides crucial context for their union.

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Katharine Hope McPhee

• Born: March 25, 1984, in Los Angeles, California.
• Career Highlight: Achieved widespread fame as the runner-up on the fifth season of *American Idol* in 2006.
• Career Trajectory: Successful transition into acting with lead roles in the TV series *Smash* and *Scorpion*, as well as a Broadway debut in *Waitress*.
• Previous Marriage: Was previously married to Nick Cokas (2008–2016).
• Children: One son, Rennie David Foster (born 2021), with David Foster.

David Walter Foster

• Born: November 1, 1949, in Victoria, British Columbia, Canada.
• Career Highlight: One of the most successful record producers and composers in history, with a career spanning five decades.
• Awards: A staggering 16 Grammy Awards from 47 nominations, along with a Golden Globe and multiple Oscar nominations.
• Previous Marriages: Katharine McPhee is his fifth wife. His previous wives include:
  • B.J. Cooke (1972–1981)
  • Rebecca Dyer (1982–1986)
  • Linda Thompson (1991–2005)
  • Yolanda Hadid (2011–2017)
• Children: Five biological daughters from previous relationships—Amy Foster-Gillies, Sara Foster, Erin Foster, Allison Jones Foster, and Jordan Foster—and one son, Rennie, with Katharine.

Inside the Fairytale London Wedding: Dress, Venue, and Guest List Secrets

Katharine McPhee and David Foster exchanged vows on Friday, June 28, 2019, a date that held special significance for the bride, marking the 13th anniversary of the day her debut single was released following her time on *American Idol*. The celebration was a deeply intimate and elegant affair held in London, a city the couple adores.

The Historic Ceremony and Exclusive Reception

The couple chose the historic Church of St. Yeghiche in South Kensington, London, for their ceremony. The traditional setting provided a beautiful contrast to the modern celebrity coupling. The ceremony was attended by approximately 150 close family members and friends, including David Foster’s five daughters and several celebrity guests.

Following the vows, the celebration moved to an exclusive, upscale venue in London’s prestigious Mayfair section for the reception. The atmosphere was one of refined elegance, where David Foster reportedly performed a song for his new bride, a testament to their shared love of music.

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The Iconic Zac Posen Wedding Gown

One of the most talked-about elements of the wedding was the bride's stunning attire. Katharine wore a custom-designed, strapless antique white tulle gown by American designer Zac Posen. The dress was a masterpiece of volume and detail, reportedly featuring an astonishing 250 yards of tulle and 150 yards of pin-tucked tulle to create its dramatic silhouette.

McPhee revealed that the gown was inspired by the timeless elegance of Princess Grace of Monaco, aiming for a classic and sculpted look. Adding a deeply personal touch, a special message was embroidered into the dress's lining: the lyrics to the song "The Color of My Love," which David Foster co-wrote and which was performed by Celine Dion.

Five Years Later: The Reality of Their Age-Gap Marriage in 2024/2025

The couple’s relationship has been a constant subject of media fascination, largely due to the 35-year age difference. As they celebrated their fifth wedding anniversary in June 2024, they have been more open than ever about the dynamics of their unique partnership, offering both candid insights and addressing persistent rumors.

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Addressing the Age Gap and Public Scrutiny

Both Katharine and David have frequently commented on the age difference, acknowledging the public’s fixation while asserting that it is a non-issue within their private life. McPhee has jokingly revealed that one of the reasons she married Foster was "for the money," a tongue-in-cheek response that highlights her comfort with the scrutiny.

In various interviews throughout 2024, Foster has emphasized that their relationship works because they have a marriage without "hard and fast rules," focusing instead on mutual respect and a shared sense of humor.

Marriage Secrets and Relationship Dynamics

The couple attributes the success of their marriage to several key factors, which they have shared in recent years:

• Shared Passion for Music: Their careers constantly intertwine, with McPhee often performing with Foster on his tours, keeping their professional and personal lives aligned.
• Focus on Family: The birth of their son, Rennie, in 2021, has solidified their bond, making them a unit focused on parenting. Foster’s five adult daughters—including Sara and Erin Foster—have also embraced Katharine, forming a large, blended family.
• Communication and Humor: They often use humor to deflect the awkwardness of the age gap and are reportedly committed to strong communication.

The Couples Counseling Rumor (2024)

Despite the public display of happiness, reports surfaced in 2024 suggesting that the couple had sought couples counseling after experiencing a rough patch in their marriage.

Sources indicated that the pair were proactive, eager to "learn the tools they need to better communicate" and navigate the complexities of their high-profile, blended family life. While neither David nor Katharine has officially confirmed the reports, the rumor highlights their commitment to working on their relationship, regardless of their public image, a very modern approach to a celebrity marriage.

The Legacy of a Modern, Musical Love Story

The 2019 London wedding of Katharine McPhee and David Foster was more than just a lavish ceremony; it was the formal start of a partnership that continues to defy expectations. From their initial meeting on *American Idol* to their fifth anniversary in 2024, the couple has built a life together that balances the demands of Hollywood with the intimacy of a close-knit family.

Their story, complete with a historic London church, a custom Zac Posen gown, and the ongoing, candid discussion about their 35-year difference, serves as a compelling and very current narrative about finding love where you least expect it, proving that for this musical duo, the harmony is real.