evan ross & ashlee simpson*Singer Ashlee Simpson and actor Evan Ross are gonna get hitched.

Jessica Simpson’s younger sister and Diana Ross’ son made the announcement via Twitter on Monday

“The love of my life said YES!!!!!!” Ross, 25, wrote, sharing a photo of the couple. Adds Simpson, 29, “My baby love and I are ENGAGED!!! Hallelujah Hawaii!!!”

The couple made their relationship public in July, and Simpson was spotted getting to know her future mother-in-law, at a concert after-party in August.

At The “Hunger Games: Catching Fire” premiere in November, Ross hinted at the pair’s future, admitting, “She’s the one.”

“I’m so in love and we’ve got amazing things going on,” he said to The Insider. “And we inspire each other.”

Evan has also spent quality time with Simpson’s 5-year-old son Bronx Mowgli from her previous marriage to musician Pete Wentz, reports People.