Price announced the happy news in an Instagram post Monday.
She shared a slideshow of photos from the couple's outing Sunday to Lantern Fest in Casa Grande, Ariz.
"Francisco Muniz IV, you're more than a dream to me. You teach me every day, you compliment me when I'm at my worst, and you push me past the edge but you're there to pick me up when I start showing signs of falling," Price wrote.
"I love every piece of you, and I appreciate you more and more every single day. I truly cannot wait to be your wife," she said.
"P.S. You're officially the master of proposals. 143. P.P.S. I ugly cried so hard that I can't even post the pictures."
E! News said Muniz and Price have been dating for several years.
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Muniz voiced his gratitude for Price in a tweet Nov. 15 while dealing with recent events.
"Thank God I have @paigey_price to help me get through this. I'd be lost without her. She's so strong and exactly what I need," he wrote.
Muniz told fans the same day that his home was flooded and destroyed after his cat turned on a sink while he was away for his uncle's funeral.
"I arrived home from my uncle's funeral to find 4 of my 5 story brownstone home under 3 feet of water. Everything I own, destroyed. Every wall, piece of artwork, personal photos, furniture," the star tweeted.
"All because my cat accidentally turned on a sink a few days ago while we were gone."
"I'm devastated and exhausted from a tough week with the loss of my Uncle Skip, 45 hours of travel to and from France to walk in to find this disaster. I've cried more yesterday and today then my whole life combined. Forgive me for venting.. I just need some support," he wrote.
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