Julia Roberts may be new to Instagram, but already she’s an expert at the perfect clap back.

Axar.az reports citing ETOnline, the 50-year-old actress was featured on a vintage fashion account for her stunning black gown at the Toronto International Film Festival, which compared her look to that of Joan Crawford.

One commenter wrote, “Joan Crawford looks way better, in my opinion, more classic and refined and Julia is wearing ugly black nail polish!

Other commenters quickly applauded the social media novice on her excellent response.

ET caught up with the Oscar winner at this year’s Toronto International Film Festival where Keltie Knight asked her if she snapped countless photos for Instagram before picking the perfect one.

“I don’t. I probably should do that!” she quipped. "I guess that’s what I should do.”

For more from the exclusive interview, including a cute exchange with co-star Dermot Mulroney, watch the clip below.