There's a tiny bump hiding under that gown!

British actor Benedict Cumberbatch and his wife, playwright and opera director Sophie Hunter are officially expecting their third child, and what better way to reveal the newest addition to their family than on the red (and gold!) carpet.

Nominated for Outstanding Lead Actor in a Limited Series or Movie in Showtime's Patrick Melrose, the Sherlock star, 42, was all smiles Monday night as he attended one of Hollywood's biggest nights with his wife of three years by his side. Smiling broadly for the cameras, Cumberbatch and Hunter, 40, kept it simple and stunning. He was decked out a classic black suit, and she donned a breathtaking bright yellow gown, which, as it turns out, was accommodating a very special guest: baby number three.

The couple already has two children together - Christopher, 3, and Hal, 1. They were married (much to the dismay of Sherlock fans everywhere!) on the Isle of Wight in England on Valentine's Day in 2015, while Hunter was pregnant with their first son, who they affectionately refer to as "Kit". Hal was born in March of last year, not long after Hunter debuted her growing baby bump on the red carpet at the L.A. premiere of Doctor Strange in 2016.

While the couple may have been mum on the carpet, Hunter's accommodating gown did most of the talking. Cumberbatch himself, however, has been open and candid in the past when it comes to sharing how his career has been impacted by fatherhood - in a positive way.

"Lots of people, especially women, get told, 'Oh parenthood is really going to affect your career' — and it does, but for the better I think," he said. "I know I’m in a very privileged position in my career but I think everyone, even if they’re in a challenging time in their life, draws strength from their children. They are your inspiration. It adds to your work, it never takes away."

Despite his darker roles as of late, Cumberbatch has been vocal about wanting to one day make the switch to more family-friendly films so that his children can enjoy them.

"I want them to know what I do for a living," he said. "We’ll all be a lot older by the time they get to see them, but yes, I would definitely like to do some child-friendly work in the future."

While Cumberbatch unfortunately didn't win an Emmy on Monday (that honour went to Darin Criss for his portrayal of real-life serial killer Andrew Cunanan in The Assassination of Gianni Versace: American Crime Story), he still got to take home the best prize of all, and despite coming up empty handed on Monday, he is now tied with legendary actor Laurence Olivier for the second-most ever nominations in the category.

NEXT: Rachel Weisz & Daniel Craig Celebrate The Birth Of Their First Child Together