One source claims the 18-year-old was actually bullied for being there -- apparently not everyone thought she earned the right to walk the shows!
The insider spilled:
Could she be any more perfect!?
The Zero Dark Thirty actress was flaw-free in an electric blue Roland Mouret asymmetrical gown that fit her like a glove.
To complement her gorgeous gown, Jessica was decked out in sapphire and diamond Harry Winston jewels and Jimmy Choo heels.
A bright red lip and soft gingery waves provided the finishing touches to Miz Chastain's breathtaking BAFTA ensemble.
Brava, Jess! Brava!
[Image via Getty Images.]