Olivia Trinidad Arias (born 18 May 1948 in Mexico) is the widow of George Harrison, former member of The Beatles. They were married on 2 September 1978, following George's divorce with Pattie Boyd, and had one son together, Dhani Harrison - born August 1, 1978.

Olivia has attended Hawthorne High School, which she graduated in 1963. She has later worked as a secretary at the A&M Records, where George Harrison happened to hold a recording contract.

Olivia, together with Linda McCartney, Yoko Ono and Barbara Bach, has been involved with the Romanian Angel Appeal since the early 1990s, which has raised millions of dollars to provide aid for children living in devastation. The Harrisons even aimed to adopt a disabled child from Romania, but were stopped by the government.

Olivia reveals her concers for the Romanian orphans in the following quote (circa 1990): "It was sort of a gradual assault on my conscience. It was slowly wearing away at me and I decided that perhaps we should try to raise some money...I went to Romania and was just overwhelmed, devastated and shocked by the situation."