Washington, Sept. 18 -- : Nearly two weeks after her beau John Mulaney announced they are expecting their first child, actor Olivia Munn shared a glimpse of her growing baby bump on social media.

Taking to her Instagram story, Olivia posted a selfie video to discuss the importance of pets' mental health.

In the video, viewers can see a glimpse of her growing baby bump as she wore a simple black coloured loose T-shirt paired with necklaces.

John broke his silence about his relationship with Olivia and her pregnancy on 'Late Night With Seth Meyers' on September 7, months after he confirmed he had split from his wife, Anna Marie Tendler, and following two rehab stints for drug addiction.

"I got into this relationship that's been really be...