Romantic comedy “Love, Rosie,” starring Lily Collins and Sam Claflin, has been sold to a swathe of new territories by David Garrett’s Mister Smith Entertainment.

Pic is produced by Germany’s Constantin Film (“Resident Evil,” “The Mortal Instruments”) and toplines hot up and comers. Collins, who previously starred in “Mirror, Mirror,” is the lead of the “The Mortal Instruments” franchise, while Claflin limns the key character of Finnick in the next two installments of “The Hunger Games.”

They play star-crossed young lovers who strike up a deep friendship at high school but are constantly separated, frustrating true love.

Buyers striking pacts include West Video (CIS), Media Pro (Czech Republic, Bulgaria and Romania), Monolith (Poland), Blitz Film (Croatia and Slovenia), Greece (Odeon), Portugal (Zon Lusomundo), Fida (Turkey), Benelux (eOne), Iceland (Samfilm), the Middle East (Jaguar Film), Israel (United King Films) and the Baltic states (Acme Film).

Asian territories onboard include Hong Long (Golden Scene), the Philippines (Pioneer Films), Malaysia (Golden Screen), Singapore (The Shaw Organization), Thailand (Sahamongkolfilm), Vietnam (Galaxy Studio), Taiwan (Long Shong) and Indonesia (P.T. Amero).

As previously announced, Constantin Film will distribute in Germany, with Lionsgate distribbing in the U.K., Imagem in Latin America and Svensk in Scandinavia.

Principal lensing begins this week in Toronto, then moves to Dublin for the rest of the shoot, aiming for a 2014 release.

Christian Ditter (“The Crocodiles”) helms from a screenplay by Juliette Towhidi (“Calendar Girls”), adapting “P.S. I Love You” novelist Cecelia Ahern’s second novel, “Where Rainbows End.” Ahern is repped by Marianne Gunn O’Conner.