Colin Farrell tipped his hat to Hollywood icon and friend Elizabeth Taylor on World Aids Day.
The True Detective 2 star honoured the late screen legend who was one of the first celebrities to acknowledge the disease and went on to found the World Aids Foundation in 1991.
In a short film about fighting the disease, the Dubliner credits Taylor for her "fearless" contribution to the cause.
"The project is a bright light on Elizabeth's fearless and tireless commitment to fighting HIV/Aids," he said. "It is an honour to be a part of it."
Since its establishment, the foundation - which aims to fund education, direct care and services to people living with Aids - has donated more than $15m (€12m) to 650 organisations worldwide.
It isn't the first time Farrell has spoken of his close relationship with Taylor, who died of congestive heart failure at the age of 79 in 2011.
In an interview with US talk show host Ellen Degeneres following Taylor's death, he admitted to having a "romantic relationship" with the late actress.
"I got to have an audience with her, and that was the beginning of a year-and-a-half or two years of what was a really cool - which feels like in my head - the last kind of romantic relationship I've had, which was never consummated," he said.
Farrell (38) will next appear on our screens in True Detective 2 in which he plays play police officer Ray Velcoro.
Filming is currently taking place in Los Angeles, which is close to home for the Castleknock-born Hollywood heart-throb.
"We're shooting in the environs of LA, which is great," he said. "It means I get to stay on at home and see the kids."
The second season of the gritty drama will also star Rachel McAdams and Taylor Kitsch and is expected to air next summer.