Answer
Excalibur, released in 1981, featured Gabriel Byrne in a prominent role. The film, an adaptation of the Arthurian legend, showcased Byrne's acting prowess and established him as a rising star in the entertainment industry. Byrne's portrayal of Uther Pendragon, the father of King Arthur, was particularly noteworthy, demonstrating his ability to bring depth and nuance to complex characters.