Complex sentence: He appeared briefly in "A Life Less Ordinary" (1997), which starred Ewan McGregor, but gained notice appearing in the horror film "Scream 2" (1997), as one of the Ghostface killers, Mickey.
Split into simpler sentences: He appeared briefly in "A Life Less Ordinary" (1997), which starred Ewan McGregor. He gained notice appearing in the horror film "Scream 2" (1997), as one of the Ghostface killers, Mickey.