And it's all thanks to her 10-year-old daughter Coco!
The 50-year-old former Friends star recently stopped by The Ellen DeGeneres Show, airing Tuesday, where she dished on her only daughter with her ex-husband David Arquette.
"Coco is very excited about the wedding," she smiles. "I was going to hire a wedding planner, but apparently she wants to do it."
"She wants to be the Maid of Honor, which I think is weird, but... she wants to be the flower girl, all the bridesmaids," she adds. "She's very excited about it."
And Coco already has wedding experience -- Courteney reveals she sang the classic "I Will Always Love You" at David's wedding to former ET correspondent Christina McLarty earlier this month!
"She just sang at David's wedding, because David got married last week, and she sang two songs. She's loving this wedding stuff," she laughs. "She's a really good singer. I don't know where she got it."
Courteney and Johnny, 38, announced their engagement last June, and have been dating since late 2013. The Cougar Town actress also showed off her engagement ring to Ellen, designed by both David and jewelry designer Jennifer Meyer.
"It just shows Johnny, myself and Coco," she explains about the sentimental ring. "It's sweet."
Watch Courteney get super-NSFW in the red-band trailer for Just Before I Go in the video below.