Fleabag fans patiently waiting for season two have some good news to celebrate today: Sherlock's Andrew Scott has officially joined the cast!

The BBC shared the casting announcement as it confirmed that shooting on season two is now underway. Creator-star Phoebe Waller-Bridge is obviously back in the title role, joined by fellow returning cast members Olivia Colman (Godmother), Sian Clifford (Claire), Bill Paterson (Dad), Brett Gelman (Martin), Jenny Rainsford (Boo), and Hugh Skinner (Harry).

"I can’t believe they let me do this AGAIN," Waller-Bridge said in a statement. "I’m so happy to be back with the incredible Fleabag team and I’m as surprised as anyone about where this series has taken us… thank God for Andrew Scott."

However, Waller-Bridge has yet to reveal exactly who Scott – best known as villainous Moriarty in Sherlock – will be playing.

Season two of Fleabag is due to debut in 2019 on Amazon Prime in the U.S. and BBC Three in the U.K. It's been three years since the series about a young woman struggling to navigate modern life in bustling London premiered to widespread critical acclaim. Waller-Bridge later won a BAFTA award for her performance as the memorably messy Fleabag.

Despite the relatively lengthy gap between seasons, Waller-Bridge has hardly been putting her feet up. She played adorable droid L3-37 in this year's Solo: A Star Wars Story, and wrote and produced BBC America's hit drama series Killing Eve.

The show, which stars Sandra Oh and Jodie Comer as two very different women who become obsessed with one another as Oh's frustrated MI5 officer begins to track down Comer's psychopathic assassin, has been renewed by BBC America for a second season.

In the meantime, it will compete for two Primetime Emmy Awards on September 17: Outstanding Lead Actress in a Drama Series for Oh, and Outstanding Writing for a Drama Series for Waller-Bridge.

Are you excited for season two of Fleabag?