Demi Lovato and Wilmer Valderrama to tie the knot soon? Couple 'always talk about marriage'

American actress/singer Demi Lovato and her long time boyfriend Wilmer Valderrama are reportedly planning to take their relationship to the next level.

The 22-year-old Heart Attack songstress and the former That '70s Show star have been dating on and off since 2010.

According to Hollywood Life, the couple are planning to tie the knot soon.

"They always talk about marriage, and they are definitely going to get married, but a timetable has not been determined for when that will happen," a source told the website.

"There is no pressure and it could happen in 2015, but it could easily happen in 2020. Its coming down to when they want to have kids, they want to do everything all at once," the insider added.

Adding on, the former Disney star might also change her last name.

"She would want to be known as Demi Valderrama but understands she has to keep the Lovato name for professional means," the source continued. "But anytime she can use his last name when they end up getting married is what she wants to do."

Meanwhile, during an interview with Fitness magazine, the former X Factor judge credited the Days of Wrath hunk for helping her to deal with her eating disorder.

"It's been difficult. I almost went back to rehab for my eating disorder last summer. I was obsessing over food and terrified of it at the same time. Wilmer noticed and called me out on it, which was a relief," she said.