Zac Efron and Vanessa Hudgens have reportedly broken up after dating since 2006, when they met on the set of the Disney Channel movie "High School Musical".
The network said the two remain friends and that there was no "third party" involved, quoting an source close to the two as saying: "They were together for so long. It just ran its course."
Efron and Hudgens played teen couple Troy Bolton and Gabriella Montez in "High School Musical" and two sequels.
The hit franchise helped launch their big-screen careers. Efron went on to star in a 2007 musical remake of the movie "Hairspray" and had a starring role in the drama film "Charlie St. Cloud" earlier this year. Hudgens can be seen in the new Zack Snyder fantasy thriller "Sucker Punch" with Carla Gugino when it hits theaters on March 25, 2011.
Efron and Hudgens were photographed together in August when they visited the cast of the Broadway musical "Memphis" and in July, when Hudgens accompanied Efron to the "Charlie St. Cloud" premiere in Los Angeles.