Mario was just one of the many celebrities who graced the red carpet for the film's UK premiere at London's West End on Wednesday night (9 December).
Mario, who posed on the red carpet with heptathlete Louise Hazel, grabbed a photo with Will and was even complimented by the famed actor and comedian.
Sharing a photo via Twitter, Mario said: "This has made my week!! Mr Ferrell told me I was 'bringing the heat' this evening ha! #legend #daddyshome."
Clearly being the highlight of his week, we have a feeling Mario will also be making some fans very happy, as he's set to make a return to TOWIE for its Christmas special.
Along with Lauren Goodger and Gemma Collins, Mario will be making a special cameo for the hour-long festive special, The Only Way Is Essexmas.
Mario quit TOWIE in August after four years on the ITVBe reality show. He said at the time: "I have had a great time on TOWIE and relished the many opportunities the show has given me but after 14 series, I feel it is time to move on and explore something new."
Catch The Only Way Is Essexmas on Wednesday 16 December at 10pm on ITVBe.
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