Credit: Jim Spellman/WireImage

Any chance of a reconciliation with Pete Wentz went out the window when Ashlee Simpson made her first red carpet appearance with new beau Vincent Piazza at the Boardwalk Empire premiere in NYC Wednesday.

The 26-year-old singer -- who split with the Fall Out Boy rocker, whom she wed in 2008, earlier this February -- looked dazzling in a a Temperley London gown at the star-studded event; Piazza looked dapper in an Alexander McQueen suit.

"She's a wonderful girl," Piazza told Us Weekly of Simpson, his girlfriend since June. "I'm so happy she's here tonight."

No word yet on if Piazza will bring Simpson to Sunday's Emmy Awards; Boardwalk Empire is nominated in 18 categories (it won seven at last week's Creative Arts Emmys).