Baby makes three! Sunday, May 10 — Mother's Day! — wasn’t just a day to celebrate moms, but also the moms-to-be, and that includes Odette Annable! Dave Annable's actress wife, 30, took to Instagram to announce the couple’s happy pregnancy news. "Happy Mother's Day! This year, I'm SO happy to announce that I get to join the party!" the October Road actress captioned a sweet photo of her growing baby bump, attaching the hashtag #babyannable.

Once the happy news started to spread, Odette's husband, 35, couldn't help but burst with parental pride. "It's out! I can now wish my beautiful wife a very happy birthday AND a Happy 1st #MothersDay! Me and #babyannable are so lucky to have you," the Red Band Society alum tweeted.

The couple, who married in 2010, are currently vacationing in Europe, and have already started spoiling their baby-to-be. One of their first stops? Luxe children's clothing store Petit Bateau. "It has begun. @OdetteAnnable in her element," the actor wrote along with the hashtags #imintrouble and #babyannable.

Brothers & Sisters star Annable has long been confident his wife will be the perfect mom. As the star told Us in 2014, she wooed him right from their very first date. "When we went on a date, I thought, 'Well, I gotta lock this up,'" he told Us. "I know I traded up in that deal!"

When Us Weekly broke the exclusive news of their intimate Ojai, Calif., nuptials, Dave was equally as thrilled to start the marriage phase of his life with Odette by his side. "I married my best friend and I could not be happier," he told Us at the time.