Rachel McAdams makes red carpet return after giving birth

Rachel McAdams returned to the red carpet Tuesday night, marking her first public appearance since reportedly giving birth to her first child.

The 39-year-old Canadian actress walked the red carpet at the premiere of her film Disobedience at the Tribeca Film festival, in a ruffled Giambattista Valli dress with plunging neckline and semi-transparent skirt.

The actress had previously been keeping a low profile amidst rumours she was expecting, even skipping out on promotion of her film Game Night, released in February.

Earlier this month, photos were published online of Rachel's partner Jamie Linden holding a newborn -- believed to be their new son -- with reports they were heard discussing what a "good baby" he is. 

McAdams didn't do interviews at the event, but did pose with her co-star Rachel Weisz, who revealed last week she's expecting a child herself.

It will be the first child Weisz, 48, has with her husband Daniel Craig, 50. Weisz also has an 11-year-old son from her previous relationship with Darren Aronofsky, while Craig has a 25-year-old daughter from a previously relationship.

"I’ll be showing soon,” Weisz told the New York Times. “Daniel and I are so happy. We’re going to have a little human. We can’t wait to meet him or her. It’s all such a mystery.”

In Disobedience, Weisz returns to her hometown and rekindles a relationship with McAdams' character that once left her shunned by her community. Their story includes a passionate sex scene, which McAdams recently said was unlike any she's filmed before. 

“Often, you’re trying to decide if it’s gratuitous or not. But this scene felt so integral to the plot and moving the story forward,” McAdams told EW. “The characters need this release to open up. There was energy to that scene that I haven’t experienced in any other sex scenes [with men] in my career. There was camaraderie to it. We both felt safe and free. All those things that you love about being a woman, you get to be with [in the scene].”