In a word? Muscular.
Source: Dwayne Johnson / Instagram
Johnson, 43, who will star as Mitch Buchannon, had his own take on the moment, writing, "The two most iconic #BAYWATCH characters of all time. 'Mitch Buchannon' and 'CJ Parker.' Embodied by the dope and talented @kellyrohrbach and some big, brown inked up bald dude who keeps showing up in these epic shots."
The pair have big shoes (er, swimming suits) to fill: The roles of Parker and Buchannon were first made famous by Pamela Anderson and David Hasselhoff.
But not to worry: Hasselhoff himself will return for the film version. Johnson announced the news earlier this month, saying, "There ain't no bay without the Hoff."
Baywatch will also star Zac Efron and Quantico's Priyanka Chopra. It hits theaters in May 2017.