The former Coronation Street star topped the annual list over the likes of Jennifer Lawrence, Kelly Brook and Lucy Mecklenburgh.
Clearly a bit surprised, she said today: "Thank you SO much for all your lovely comments about FHM. I'm very overwhelmed and totally can't believe it! Thank you to EVERYONE who voted!"
Less surprised about her win was fiancé Mark Wright, who couldn't resist doing a bit of bragging this morning about his gorgeous missus.
He tweeted: "To all the fellas in the world I just want to say..... I'm sorry !!!! That beautiful creature is about to be my wife."
Michelle learned of her Sexist Woman win after touching back down in the UK following a hen do in Dubai with pals including Brooke Vincent and soon-to-be sister-in-law Jess Wright.
She's due to marry ex-TOWIE star Mark next month.
The Top 10 Sexiest Women in the World 2015 are:
1. Michelle Keegan
2. Kendall Jenner
3. Jennifer Lawrence
4. Kate Upton
5. Caroline Flack
6. Ariana Grande
7. Margot Robbie
8. Lucy Mecklenburgh
9. Emilia Clarke
10. Kelly Brook
Michelle Keegan and Mark Wright's romance in less than a minute!
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