Olivia Munn and John Mulaney celebrate son Malcolm's first birthday with festive chocolate cake

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Olivia Munn took to Instagram on Sunday to mark her and boyfriend John Mulaney's son Malcolm's first birthday.The 42-year-old actress shared outtakes with her 2.8 million followers as she and the comic, 40, presented the little one with a chocolate cake.She wrote in one of three captions: 'Just got back from celebrating ONE YEAR of the most joyful baby being in this world and in our lives.' First birthday: Olivia Munn took to Instagram on Sunday to mark her and boyfriend John Mulaney's son's Malcolm's first birthday She continued, 'My son, my joy.

Happiest Birthday Malcolm Hiệp! I love you so so so much.'A slew of images showed the little boy covered in cake as he sported a knitted crown with the number one sewn into it.

Malcolm matched his dad in a pair of gray shorts and a button-up white shirt with its sleeves rolled up.The family-of-three were all barefoot as they sat together on a deck outside with lush greenery and water behind them.

Sweet: The 42-year-old actress shared outtakes with her 2.8 million followers as she and the comic, 40, presented the little one with a chocolate cake Olivia was a proud mom as she donned a red and white party hat on top of her lustrous dark hair.She wore a patterned, long-sleeved green wrap dress with a deep side slit that showed her leg.The Tales of the Walking Dead star wore two sets of tiny huggie earrings and layered three necklaces.She glowed in a face of soft makeup that accentuated her already staggering features.