One Tree Hill star Tyler Hilton and Secret Life of the American Teenager actress Megan Park are engaged, their rep confirms to Us Weekly. Credit: Jason Merritt/Getty Images for US Weekly

Costars, couple and soon-to-be spouses! Tyler Hilton and Megan Park are engaged, their rep confirms to Us Weekly.

The 30-year-old One Tree Hill actor and 27-year-old Secret Life of the American Teenager actress are planning to wed in California in Spring 2015. Hilton proposed to his longtime girlfriend with his great-grandmother's ring.

The couple met in 2006 on the set of Charlie Bartlett, and have been together ever since. Hilton shared 25 things fans don't know about him with Us in April 2012, and included Park on his list. "I've been dating and slowly being groomed into a much cooler person by Megan Park for the last five years," he said.

In addition to planning their wedding, the bride-and-groom-to-be are very busy with their careers. Hilton is recording a country music record in Nashville, which is set to be released this summer. Park, meanwhile, is filming ABC's comedy series The Neighbors, and will next be seen on the big screen in The F Word opposite Daniel Radcliffe, Adam Driver and Zoe Kazan.