Twilight star Kellan Lutz has reportedly split from his long-time girlfriend.

The 28-year-old actor, who has been dating Australian actress Sharni Vinson since 2011, is believed to have parted ways with his Step Up 3D co-star earlier this month, according to USMagazine.com.

Vinson was previously linked to CSI: NY star A.J. Buckley, while Lutz previously dated 90210's AnnaLynne McCord.