Ashlee Simpson has joined her sister in almost-married bliss.

On Monday, Jan. 13, Evan Ross, 25, announced his engagement to the 29-year-old pop singer -- quite the joyous moment in the pair's whirlwind romance.

"My baby love and I are ENGAGED!!! Hallelujah Hawaii !!!!!" Simpson said on Twitter, attaching a stoic photo of the couple that showed off her engagement ring.

 

Ross echoed her excitement in his own post to Twitter, attaching the same image. “The love of my life said YES!!!!!!," said the groom-to-be.

The Los Angeles Times reports they were good friends for a long time before they began dating less than a year ago. Though you may know Ashlee is well known as the younger sister of Jessica Simpson and ex-wife of rocker Pete Wentz, her fiancé, Evan, has been a little less visible in entertainment headlines over the past few years.

To give you a quick rundown on the special man in Ashlee's life, we've gathered five facts to know about Evan Ross. 

1. He's An Actor

Ross is an actor who is widely known for his performance in the 2006 drama "ATL," featuring the rapper T.I. He starred in the TV series "902190" and recently played the role of music producer Dallas Austin in TLC's VH1 television movie "Crazy Sexy Cool." Ross will also portray Messalla in "The Hunger Games: Mockingjay."

2. His Mother Is A Music Legend

Yes, Evan is the son of The Boss herself, Ms. Diana Ross.

Evan's father is the late Norwegian businessman Arne Næss, Jr., who passed away in 2004 after a climbing accident in a town outside of Cape Town, South Africa.

3. Their Love Connection Was Made In Less Than A Year

Evan and Ashlee have been dating for reportedly only seven months, says The Stir. When they first revealed their status, they said they were a couple. But as the L.A. Times reports, they were friends for years before becoming an item. 

4. Evan's Sister Tracee Is Also A Hollywood Star

Evan's Sister Tracee Ellis Ross is also an actress and style goddess who is best-known for her role as Joan Clayton in the long-running TV series "Girlfriends." Ross share her own excitement about the pair’s engagement in a post on her Instagram account:

5. He Is The Youngest Of His Siblings 

RTR1R6RX Evan and his siblings -- (L-R) Chudney Ross, Evan Ross, Rhonda Ross Kendrick, Ross Arne Naess and Tracee Ellis Ross -- presented their mother Diana Ross her Lifetime Achievement award at the 2007 BET Awards in Los Angeles. Photo: Reuters Evan is the youngest of Diana's five children. The second youngest is his brother Ross Arne Naess -- who is also the biological son of Arne Naess Jr.  The rest of his siblings are Chudney Ross, 38, Tracee Ellis Ross, 41, Rhonda Ross Kendrick, 42.