A-list actor Chris Pratt goes on Bible-based ‘Daniel Fast’ — which includes 21 days of intensive prayer and fasting

Actor Chris Pratt is embarking on a 21-day journey of intensive prayer and fasting.

What are the details?

"The Daniel Fast," as it's called, encourages its participants to come closer to God through a special diet and through petition and prayer.

In his most recent Instagram story, Pratt said, "Hi, Chris Pratt here. Day three of the Daniel Fast, check it out. It's 21 days of prayer and fasting.

"It's going to coincide also, coincidentally, with the 'Lego Movie 2' junket. So, by the time you see me, I'll probably be hallucinating," he added. "Stay tuned."

The Bible-based fast is inspired by Old Testament prophet Daniel, and restricts participants to unleavened breads, fruits, and vegetables.

A website for the Daniel Fast adds that it is "based on the fasting experiences of the Old Testament prophet and typical Jewish fasting principles."

"Only food grown from seed is allowed and the only beverage is water," the site notes.

The diet is "[e]ntering into a period of extended prayer and fasting is like pushing the 'pause button' on life so you can draw nearer to God," the site says.

"The Holy Spirit joins you in this experience as you open your heart to receive from the Lord," the site reads.

The fast also offers online support, a book and workbook combination, and recipes to follow during the 21-day period.