"She looks really beautiful and young and elegant," Brad tells the co-hosts in the clip above.
So who's calling Jennifer's dress "amateur hour" on the show? Tim Gunn!
"I loathed this look," he reveals. "I just felt like it was not rising to the occasion the way I would expect her to."
Watch the preview clip to see what else Tim had to say about Jennifer's look!
Want to hear what the co-hosts think about Brie, Heidi, Alicia Vikander and more celeb looks from the Oscars? Then make sure to watch the Fashion Police Oscars special!
Watch E!'s live 2016 Oscars red carpet coverage starting at 1:30p.m. ET/10:30a.m. PT on Sunday, February 28th