Ashley Tisdale Replaced by Cassi Thomson in 'Left Behind'

Ashley Tisdale holds hands with her fiance Christopher French as they grab lunch and run some errands on Tuesday afternoon (August 13) in West Hollywood, Calif.

The 28-year-old actress showed off her gorgeous new engagement ring.

PHOTOS: Check out the latest pics of Ashley Tisdale

“Thank you guys for all your well wishes. Means so much to me. We’re so grateful and excited. #imthehappiestgirlintheworld,” she recently tweeted.

According to Variety, Ash has just been replaced in the upcoming film Left Behind by Switched at Birth actress Cassi Thompson.

30+ pics inside of Ashley Tisdale and Christopher French…