E! News reports the 33-year-old actor is expecting his first child with girlfriend Anna Strout, with whom he's been dating off-and-on since 2002.
Congrats you two!!
In case you need a refresher, The Social Network star dated Strout from 2002 to 2012 before dating Mia Wasikowska between 2013 and 2015.
Shortly after his split from the Alice In Wonderland star, Eisenberg got back together with his longtime love and the rest is history.
It's unclear how far along Anna is in her pregnancy, but we will certainly keep you updated as we learn more!
[Image via WENN.]