A source close to Ashlee says the new relationship was a long time coming for the two: "It helps that they were friends first.
HBO gathered the stars of Boardwalk Empire last night at NYC's Zeigfeld Theater to celebrate the show's second season, which debuts on the network Sept. Leading man Steve Buscemi had the company of his wife, Jo Andres, while Michael Pitt had his model girlfriend, Jamie Bochert, and Vincent Piazza made his red carpet debut with Ashlee Simpson.
Ashlee was recently linked to "Boardwalk Empire" actor Vincent Piazza before the two split in November of last year.
Also, Simpson has a 4-year-old son named Bronx with 33-year-old Fall Out Boy member Pete Wentz from their marriage that ended in 2011.
(The pair have a son together, four-year-old Bronx.) Their divorce was finalized in November 2011.
It was honestly just a long distance relationship and it became too hard to make it work," the source explains.
The gang moved their festivities over to the Waldorf Astoria for the afterparty, where Jack met up with his aunt, Anjelica Huston, and Kelly gave her pal Emily Mortimer a big hug.
The premiere of Boardwalk Empire is much anticipated, especially after the series just won seven creative Emmys last weekend.
"She'd stop to kiss him; she couldn't take her eyes off him." We're talking non.
We haven't heard about lip-syncing like this from Ashlee since ... The next day, he even took the younger sister of Jessica Simpson to the airport for her flight back to L. "He likes her." A source says they were set up by a friend, adding that the star, who was spotted on a friendly outing with Wentz and son Bronx, 2, in L.