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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"And now we get to have our kids at this ceremony :)" she continued. "It'll be shorter. We'll get to the cake sooner! YAY renewal!!!"Hannigan, 39, and Denisof, 47, met on the set of Buffy the Vampire Slayer in 1999 and married in October 2003. They have two daughters, Satyana, 4, and Keeva, 1.