Michelle Trachtenberg and Pete Wentz
JLM/Splash News Online
07/05/2011 AT 12:00 PM EDT
Fourth of July fireworks may not have been the only sparks flying for Pete Wentz
and Michelle Trachtenberg this weekend. The rocker, 32, and the actress, 25, were spotted in Los Angeles Sunday grabbing coffee.
In light of Wentz's pending
from singer-actress Ashlee Simpson
, could he and Trachtenberg – who were an item before he and Simpson wed in 2008 – be rekindling their romance? Or are they just friends?
Their outing comes shortly after Simpson was romantically linked to Boardwalk Empire
star Vincent Piazza.
Despite their estrangement, there appears to be no bad blood between the parents as they took son Bronx to lunch
in Studio City, Calif., recently.
Trachtenberg's rep had no comment while Wentz's was unavailable.