Spencer turns 26 today (6 August) but he decided to start the party early yesterday with a new hairdo.
The lothario showed off his new look with a photo posted to Twitter, showing the side of his head shaved. Captioning the snap, he said: "New haircut... Courtesy of @JAManzi... Hit her up, she's the best x."
Taking to Twitter today, Spencer told fans that he now feels rather "old".
He said: "I am now officially old... Yes, it's my birthday... @LFrazerHutton just got me the best cake ever.. Happy boi x."
We want a glimpse of the cake!
Spencer received lots of birthday messages from his fans and co-stars. Best mate and former MIC star Hugo Taylor said today: "@SpencerGeorgeM happy birthday my man. Growing older is part of life: growing up is entirely optional. Love, life and happiness always."
Meanwhile, Oliver Proudlock tweeted: "Happy birthday to ma boi @SpencerGeorgeM !!! #1time."
Viewers will be seeing Spenny back on our screens soon, as the highly anticipated New York series kicks off this Sunday! Viewers will see the gang immerse themselves in the New York culture while exploring all that the Big Apple has to offer.
Made In Chelsea: New York airs Sunday 10 August at 9pm on E4.
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Trailer : MiC:NYC Episode 1