The TV presenter, currently on T4, revealed that he is "delighted" to be getting married to long-term girlfriend Bryony Emmett.
Edmondson tweeted: "I liked it. So I put a ring on it. Yesterday I proposed to Bryony and she said YES. I'm delighted!"
The 26-year-old's new fiancée Emmett said that the pair are taking their dog on holiday to East Sussex to celebrate the engagement.
She wrote on the social networking site: "After the best day of my life we're off to Rye for the weekend with Oscar. Road trip!"
Edmondson, who also narrates ITV2's Totally Bonkers Guinness World Records, shot to fame in 2009 for his online X Factor spinoff F Factor.
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