Mark Wahlberg and Dr. Oz are not seeing eye-to-eye on the most important meal of the day.

It started when Dr. Oz made a comment about skipping breakfast. Instead, he promotes intermittent fasting (not eating after 7 p.m. and then leaving out breakfast).

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He isn’t the only one who is a fan of fasting, studies and other celebrities all support the trend.

One person that isn’t a fan is Wahlberg who told TMZ that everyone should always have breakfast. In fact, he has two.

He challenged Dr. Oz to come and train in the gym with him to see how he holds up and Oz accepted.

“Bring it on, @markwahlberg. Let’s settle this in the gym. 💪 #TeamNoBreakfast #System20,” he wrote on Twitter.

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Wahlberg’s workouts are pretty insane so should be interesting on how this works out.