Tom Fletcher: "Mummy & Daddy's alarm clock"
Despite the early morning wake-up calls, Tom has been in his element since reuniting with his family at the weekend.
On Saturday, the 28-year-old headed home during a brief break in the McBusted tour to be with Buzz and wife Giovanna Fletcher.
Tom Fletcher: "I think he's happy daddy's home"
He shared a sweet snapshot of himself cuddling up with his son, who has a little smile on his face as he sleeps on Tom's chest. "I think he's happy daddy's home," he wrote alongside the photograph.
Talented musician Tom has wholly embraced parenthood since the arrival of Buzz on 13 April.
Tom Fletcher and Giovanna welcomed Buzz on 13 April
Both he and HELLO! Online blogger Giovanna regularly keep fans updated with their progress, as well as sharing adorable pictures of their baby boy.
Just recently, Tom celebrated some good news. "I'm nominated for dad of the year?!" he told his Twitter followers. "Awesomes. Whoop!! Although I think I just caught Buzz voting for @SimonCowell."
Giovanna Fletcher: "Off to spend a day with @giorginafalcone. Buzz is very excited. Ha!"
After a bank holiday weekend with his family, Tom headed back on tour on Tuesday. His childhood sweetheart Giovanna, meanwhile, decided to take little Buzz along to see her sister Giorgina Falcone.
Sharing a very sweet photo taken with her sleeping son on the Tube, she wrote, "Off to spend a day with @giorginafalcone. Buzz is very excited. Ha!"
All the news as Duchess Kate's due date draws close...