Mason and his aunt Khloé Kardashian sure are having a blast celebrating his 3rd birthday!
As Life & Style previously reported, the X Factor co-host made her way to Miami from LA after the show last night — just to see her darling nephew and spend time with him on his big day.
"Someone is 3 today!!! Happy Birthday Mase," the 28-year-old captioned this adorable photo of her and the little guy wearing matching Thomas the Tank Engine party hats!
Mom and dad, Kourtney Kardashian and Scott Disick, never fail to honor their firstborn's birthday — and this year was no different.
EXCLUSIVE: How Kourtney Kardashian and Scott Disick's son Mason is celebrating his 3rd birthday
"Mason's birthday party will be held at Serendipity 3 in Miami," a friend close to Kourtney reveals to Life & Style. "All of the family is going and it will be a big thing."
And Khloé's not the only aunt tweeting about the special day.
PHOTO: Kourtney Kardashian and Mason spend beach day with aunt Khloé
"My birthday boy!" Kim tweeted earlier today, adding, "Love you Mase."
He sure is one cute birthday boy!