Ashlee Simpson goes public with new boyfriend Evan Ross

Ashlee Simpson went public with her new boyfriend Evan Ross at the launch of her sister Jessica's new clothing line in New York City on Tuesday night (30Jul13).

Simpson turned out to support her elder sibling's latest venture, the launch of her Jessica Simpson Fall 2013 Campaign, at Manhattan venue Above Allen and she brought Diana Ross' son along as her date.

The 28 year old has been linked to Ross for several weeks, but Tuesday night's outing to the party marked their first public appearance as a couple.

Simpson previously dated Boardwalk Empire actor Vincent Piazza, and she has a four-year-old son, Bronx, with her rocker ex-husband Pete Wentz.