Alyson Hannigan and Alexis Denisof Alyson Hannigan and Alexis Denisof

Once just isn't enough for Alyson Hannigan and Alexis Denisof. After nearly 10 years of marriage, the couple announced their plans to say "I do" once more.

"My hubby @AlexisDenisof surprised me with the most romantic day of my life yesterday! Which included another proposal & ring! I said YES!" Hannigan tweeted Sunday.

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