The former TOWIE star treated the new dad to some well-deserved gifts on behalf of their newborn son Arlo.
Sharing some heartmelting snaps on Instagram, Billi wrote: "Happy Fathers Day Daddy We Love You So Much @andytcarroll#LoveMyLittleFamily."
In one photo, footballer Andy is cuddling and kissing his tiny newborn son.
In another, Arlo - dressed in a blue babygro - is fast asleep next to Daddy's presents and Happy Father's Day balloon.
Bikram Yoga instructor Billi has been keeping her fans updated with her new role as a mummy ever since Arlo was born just days ago on Monday 15 June.
This week, she shared a photo of their first family day out - and Billi looks stunning in black.
Standing in front of silver letter balloons spelling out 'Arlo', there's no hint of sleepless nights on the faces of the new parents!
What a gorgeous family portrait!
Billi and Andy, who got engaged in November 2014, announced their baby's birth via Twitter with the message: "Welcome To The World Our Beautiful Baby Boy @AndyTCarroll."
Sharing the same photo, Andy wrote via Instagram: "Welcome To The World Little AC!! 9 Months Of Cooking And What A Wonderful Job You Have Done @billimucklow."
They later confirmed they'd named the tot Arlo Thomas Carroll.
They revealed they were pregnant on Christmas Day 2014, just a month after their engagement.
Andy also has two kids from a previous relationship.
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