Is Adriana McPhee Related to Katharine McPhee? Yes, Confirmed as Sisters by Multiple Sources
March 3, 2026 — Los Angeles
Adriana McPhee is the older sister of singer and actress Katharine McPhee, now known as Katharine McPhee Foster, according to consistent documentation from Wikipedia, family websites, and entertainment news outlets. The question “is Adriana McPhee related to Katharine McPhee” is affirmatively answered across these sources, highlighting their shared family ties in music and performance.
Family Confirmation
The Wikipedia entry on Katharine McPhee explicitly states that Adriana McPhee is her older sister and has served as a vocal coach on American Idol since 2012. Similarly, Adriana McPhee’s official website describes her as the daughter of cabaret artist Peisha McPhee and sister to Katharine McPhee, known for Smash, Scorpion, and Broadway’s Waitress. These primary sources directly address and confirm “is Adriana McPhee related to Katharine McPhee” with clear familial details.
54 Below venue bio also notes Adriana as the daughter of Peisha McPhee and sister to Katharine McPhee, reinforcing the connection.
Media and News Reports
Entertainment news has frequently covered their relationship. In July 2022, The Blast reported Adriana McPhee Collin, Katharine’s sister, filing for divorce after 11 years of marriage. Earlier, a 2006 TMZ interview featured Katharine interviewed by her sister Adriana McPhee, then an EXTRA correspondent.
These reports illustrate how the query “is Adriana McPhee related to Katharine McPhee” has been addressed in real-time celebrity coverage over two decades.
Joint Family Performances
The sisters have performed together in family events. A December 2022 Cabaret Scenes review covered “A Family Affair,” featuring Peisha McPhee, daughters Adriana and Katharine McPhee-Foster, and son-in-law David Foster. A fan site, KatharineMcPhee.net, details the concert with songs like “Sisters” and “If Momma Was Married.”
Family concert videos further visualize their bond, such as this YouTube clip.
Recent Online Discussions
Recent X (Twitter) semantic and keyword searches on “is Adriana McPhee related to Katharine McPhee” yielded no substantive news, only unrelated or speculative posts with low engagement, per source analysis [8].
The consistent verification from official sites, Wikipedia, and media leaves no doubt about their sisterhood.
