It’s the end of the road for Selena Gomez and her Wizards of Waverly Place co-stars…

The 19-year-old half-Mexican-American actress/singer’s hit Disney Channel program will come to a magical close with tonight’s series-ending episode.

“It’s very much affecting me,” Gomez told TV Guide during taping of the finale episode. “I’ve been quiet, keeping to myself, and everyone keeps asking me what’s wrong. They keep saying to have fun, end on a high note.”

Wizards of Waverly Place has proven to be one of the most popular shows in Disney Channel history during its four seasons. During its run, the series reached more than 182 million viewers in 169 countries in 32 different languages. And, it even scored a 2009 Emmy for Outstanding Children’s Program.

As the show winds down, creator Todd Greenwald has managed to do his best to keep the results of the wizard competition in tonight’s finale a surprise for everyone.

That meant handing the final four script pages to the cast an hour before the last scenes were shot so that “when they were on stage, it was like watching it all unfold for the first time,” he explained after production wrapped.

“It was definitely satisfying and the actors, who were playfully jockeying to see who would win the competition, didn’t see [this ending] coming. I think the audience will be happy with how it turns out.”

Wizards of Waverly Place airs Friday at 8:00 pm ET on Disney Channel.