Ashley Tisdale Guest Stars on 'MacGyver' with Lucas Till Tonight!

Remember when we told you Ashley Tisdale was going to guest star on CBS’s MacGyver? Well, tonight’s the night it happens!

The actress will star in the episode as Allie, one of Mac’s (Lucas Till) competitors, and former flame, who he must help when something goes wrong in a government operatives challenge.

PHOTOS: Check out the latest pics of Ashley Tisdale

“@ashleytisdale decided to show up on our set today,” Lucas posted on Instagram when they were filming. “Maybe shouldn’t divulge too much but will tell you it’s to do something, ‘CIA’y… CIAish… In relation to the CIA.”

MacGyver airs TONIGHT, Friday, January 12th @ 8PM ET/PT on CBS.