Mia Farrow and Frank Sinatra's relationship, though short-lived in terms of marriage, endured as a lasting friendship until the singer's passing in 1998. The couple first met in 1964 on the 20th Century Fox lot when Farrow was 19 and Sinatra was nearly 50. Despite their significant age gap, they quickly fell in love and tied the knot in 1966 at a Las Vegas hotel.
However, their marriage ended in 1968 when Sinatra served Farrow with divorce papers on the set of her film Rosemary's Baby. Despite the split, the two maintained a close friendship over the years. Farrow has publicly expressed her affection for Sinatra, even commemorating what would have been his 107th birthday in 2023 with a heartfelt Instagram post.