The "Twilight" star fears he'd look like a "moron" if he tried to emulate his style icon.
"I wish I could dress like A$AP Rocky," he tells British GQ. "He just has serious style. We have been to quite a few different fittings together and I will see the craziest thing and really want to wear it, but I'd look like a total moron."
"Then we will go to the show and I will see Rocky in it and be like, 'Jesus Christ, you can literally wear anything!'."
Pattinson hates a lot of his old red carpet looks, but his fashion choice for the London premiere in "Harry Potter and the Goblet of Fire" in 2005 was the worst of the worst.
"I was wearing leather trousers with these cowboy boots and a velvet jacket," he recalls. "I mean, it literally looked like a kid had gone into a dressing-up box."