The former Liberty X star, 35, beat runner-up Jolan to the title on Saturday night (9 April) - and the dad-of-two had lots of celebrity support, not least from his former bandmates.
After strong performances all night from both Kevin and Jolan, Cody Frost and Lydia Lucy were voted off first leaving the two lads to battle it out in the final round.
After being announced as the winner, Kevin told the BBC audience: "I can't believe it. Honestly, I couldn't have dreamed that this would have happened at my ripe old age."
Clearly overwhelmed, he added: "I'm so grateful to everyone who has made this show such an amazing experience."
Meanwhile, Jolan paid tribute to Kevin when he told hosts Emma Willis and Marvin Humes: "What an amazing man Kevin is as well. I couldn't wish for anyone better to win it. He's like an older granddad."
Kevin's former Liberty X bandmates Kelli Young, Tony Lundon and Jessica Taylor were in the audience cheering him on, while Michelle Heaton supported him on Twitter.
He will now go on to release the winner's single, which this year is an original song called 'All You Good Friends'.
His win means coach Ricky Wilson had the winning act for the second year in a row.
The Voice UK will air on ITV from next year.
After Kevin's win, social media was ablaze with tributes from the celebrity community...
Read some of the tweets here:
Heading home after the MOST amazing night...so incredibly proud of our boy @Kevsimmx - couldn't happen to a nicer guy xxx— Jessica Taylor (@JessicaLibertyX) April 10, 2016
Yes KEVIN!!! Get in xxx congratulations xx— Claire Richards (@_ClaireRichards) April 9, 2016
Well done @Kevsimmx ..oh, and 35 is young! You never stop having talent and creativity at any age! Dispel the British myth! Enjoy it all!— Boy George (@BoyGeorge) April 10, 2016
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