Bruce Willis and Demi Moore's daughter Tallulah is engaged: See her massive ring

The Willis-Moore family is expanding. 

Tallulah Willis, the youngest daughter of Bruce Willis and Demi Moore, announced on Instagram Tuesday that she's engaged to Dillon Buss. (Bruce and Moore, who were married from 1987-2000, also share daughters Rumer, 32, and Scout, 29.) 

Instead of a traditional "yes" after her film director beau got down on one knee, Willis wrote she would "with absolute most certainty" accept his hand in marriage. 

"I can finally call you my fiancé. Love you forever Buuski Lu, you are my best friend," Buss captioned several photos on Instagram, calling out their Star Wars day engagement date: "#maythefourthbewithus."

Willis later shared a close-up video of her massive emerald-cut engagement ring: "HANDS STILL SHAKIN’ — MOMS SPAGHETTI — I’m FIANCÉNCHED." 

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Willis' family shared their excitement and congratulated the couple on social media. 

"I love these crazy kids," Rumer Willis posted on Instagram. "Congratulations @dillonbuss and @buuski I love you both so immensely and I am so excited for you."

Tallulah Willis attends Sony Pictures' "Once Upon A Time...In Hollywood" Los Angeles Premiere on July 22, 2019 in Hollywood, California.

Scout Willis welcomed the "first official WILLIS BROTHER" in the family: "I’m so buoyed by this JOYOUS LOVE CELEBRATION… today is a blessing because of your love!"

Emma Heming Willis, Bruce's second wife, commented several red heart emojis under Willis' engagement post. (Bruce and Emma Willis, who tied the knot in 2009, share two children together: Mabel, 9, and Evelyn, 7.)

Exes Bruce Willis, Demi Moorequarantine together with their children 

Although it's not clear when the newly engaged couple started dating, Buss  quarantined with Willis and her family (in matching striped pajamas nonetheless) early in the COVID-19 pandemic lockdown last year. 

"Chaotic neutral," Willis captioned the Instagram photo in April 2020, which showed Bruce and Moore front and center standing arm-in-arm. Scout, Buss and a pajama-clad dog are also shown in the photo.

Willis and Buss first went Instagram official in February 2020. 

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