Among the usual social media sniping have been plenty of compliments thrown her way, including “stunning”, “a vision” and “gorgeous”.
The shoulderless red number was sometimes covered in a black coat as shooting progressed through the evening.
Jennifer, who is about to turn 50, hasn’t been a TV regular since ditching the medium for the big screen.
Her new project, for Apple TV, also stars Reese Witherspoon. The pressure isn’t yet on for Jen’s return to TV – the network has ordered two seasons upfront.