Ashlee Simpson, little sis of Jessica Simpson and ex-wife of and baby mama to Pete Wentz of Fall Out Boy, is getting hitched again. She is now engaged to her boyfriend Evan Ross.

Simpson tweeted a romantic photo of the duo and showed off the ring, which looks like an antique or an heirloom.

Ross shared the same photo, captioning it, "The love of my life said YES!!!!!!"

OMG, these two! So in love.

Ross, 25, is the son of Motown diva Diana Ross. Notice that Simpson said "Baby love" in her tweet, which was a huge hit for Miss Ross' vocal group The Supremes back in 1964. That had to be intentional.

This will be the second marriage for Simpson, 29.

Simpson, whose music career has cooled in recent years, married Wentz in 2008 and was professionally known as Ashlee Simpson Wentz before they split. She is mom to their son Bronx Mowgli, born in Nov. 2008.

Simpson and Wentz divorced in 2011. She dated actor Vincent Piazza for over a year before splitting with him in 2012.