Ross landed his first major role as Ant in the 2006 comedy in November.
"I'm on team Katniss." PHOTOS: Best celebrity engagement rings of all time 3.
This "Supremes" scion, like his mama, can also sing! In the past, Ross was rumored to have dated Aubrey O' Day, Lindsay Lohan, Hayden Panettiere and costar Hilary Duff.
And although he was last linked to longtime love Cora Skinner, Ross seems to be smitten with single mom Simpson, who has a 4-year-old son with ex-husband Pete Wentz.
Evan Olav Næss (born August 26, 1988), known professionally as Evan Ross, is an American actor and musician.
The pair celebrated together with family and friends at Simpson’s birthday party in October and attended his mother’s Los Angeles concert in August.
Ross has even bonded with Simpson’s 5-year-old son Bronx Mowgli from her previous marriage to Pete Wentz.
He made his acting debut in the 2006 drama film ATL, and has since starred in the films Pride (2007), According to Greta (2009), Mooz-lum (2010), 96 Minutes (2011), Supremacy (2014), and The Hunger Games: Mockingjay – Part 1 (2014) and Part 2 (2015).
On television, Ross had a recurring role as Charlie Selby on The CW's teen drama series 90210, and starred on ABC's crime drama series Wicked City as Diver Hawkes.
He knew Simpson was "the one" after about four months of dating.
Ross went public with his romance with Jessica Simpson's younger sister last July. Insider that she was "the one," and marriage was "for sure" in their future.
The groom-to-be has also Simpson's 5-year-old son, Bronx, from her previous marriage to Pete Wentz. Christmas with my baby @ashleesimpson and Bronx spending xmas with mom!