First Major Breakup
- 2007: Megan scored a lead role in Transformers in 2007 opposite Shia LaBeouf, which was a major turning point in her career. Brian also kept busy with a role on Fox's Terminator: The Sarah Connor Chronicles, but reports of animosity between the two over their careers began to swirl.
- 2008: With the success of Transformers under her belt and quickly on the way to being America's biggest sex symbol, Megan went on to rack up plenty of roles in big hits like Jennifer's Body, while Brian acted in a collection of smaller roles on CSI: Miami and Smallville. With two careers booming, their relationship seemed to feel a strain, with Brian admitting to TV Guide, "We have more time away from each other now than we’d like."
- 2009: After being engaged for nearly four years, the couple called off the wedding in February 2009. Neither Megan or Brian commented publicly on their reported split (or the rumors of Megan cheating with costar LaBeouf), but Megan did give a glimpse into what led to their breakup when she spoke to Us Weekly on the red carpet for Transformers: Revenge of the Fallen in June 2009. "Marriage isn't a realistic goal for someone who is 23, that's all," she told the magazine. "I just wanna concentrate on becoming a better person before I try to commit to being someone else's wife."