The reality star spent some more quality time with his nephew this week and clearly found it hard to prise himself away.
Posting the photo to Instagram last night (7 May), Mario said: "Last cuddle! Now back to Essex!!"
In the photo, a tanned Mario gently cradles Buzz and strokes the side of his head while Buzz looks up at his uncle adoringly while sucking on a dummy.
Mario later gushed: "Love him!! Soooo much!"
Mario's sister Giovanna and her McFly husband Tom Fletcher welcomed baby Buzz on 13 March. The couple unveiled Buzz to the world via a very sweet video posted to YouTube.
Mario has been making the most of his free time since series 11 of TOWIE wrapped up last month. The Italian tailor jetted off to Dubai with friends for a fun-filled holiday and only just returned on Tuesday (6 May).
The cast of TOWIE will also be heading off to Marbella next month, where they'll be filming a special episode for series 12!
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Celebrities who welcomed babies in 2014 in pictures:
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