As of November 2007, Rhys is dating actress Sienna Miller.
Rhys has blond hair and blue eyes.
Rhys has said that he changed his last name from Evans to Ifans when he was 13 "to be difficult."
Rhys was the lead singer of the Super Furry Animals before they found national success.
Rhys is the son of Eirwyn and Beti.
Rhys made cameo appearances in the music videos "God! Show Me Magic" by the Super Furry Animals, "Mulder & Scully" by Catatonia and "Mama Told Me Not To Come" by Tom Jones and the Stereophonics.
Rhys made an appearance in the rock band Oasis' video for their single "The Importance of Being Idle" in 2005.
In 2005, Ifans was awarded a BAFTA for his portrayal of comedian Peter Cook in the TV film Not Only But Always.
Rhys is 6'2"