John Mulaney plays with his baby boy as he and Olivia Munn celebrate his four month birthday

dailymail.co.uk:

Olivia Munn celebrated her son Malcolm's four month birthday by posting a slew of adorable content of the youngster on Thursday.In video posted to her Instagram Stories, her boyfriend John Mulaney doted on the infant as he lay on the couch in a whale print onesie.'I love you Malcolm,' John, 39, adorably told his son as he fawned over him. 'I love you Malcolm':Olivia Munn celebrated her son Malcolm's four month birthday by posting a slew of adorable content of the youngster on ThursdayThe comedian held his little hands and gazed fondly at the child.'Birthday fun this morning before his daddy left for Texas,' Olivia, 41, wrote in the video which referenced John's upcoming tour stops in Austin.

The former Attack Of The Show host also posted a heart-melting photo of her holding her baby boy.She captioned it with a special message gushing about his 'chill' and happy demeanor, from his smiles to love for story time.

That's his boy! Mulaney held his son's hands as he gushed over him So cute! The youngster enjoyed some quality time with his father before the comedian headed out of town on tour 'It’s been 4 months since the happiest, chillest baby came into my world,' Olivia began in the post. 'He wakes up smiling every single morning without fail, he loves bath time so much that he kicks his legs and looks around whenever he hears the sound of the tub filling up, his tiny fists are his favorite things to gum on and he squeals and follows along page by page whenever we read to him.'I, on the other hand, rotate the same three t-shirts and sweatshirts,' she added. 'Happy 4 month birthday Malcolm.

I love you I love you I love you.'The beauty even shared a photo of her mother cuddling her grandson. 'Spending his 4 month birthday with.