WWE star John Cena is on Fruity Pebbles

That's John Cena and Bamm-Bamm on the covers of Fruity Pebbles and Cocoa Pebbles. Courtesy of Post

Beginning today, WWE superstar John Cena and Bamm-Bamm will replace Fred Flintstone on the front of more than 8 million Post Fruity Pebbles and Cocoa Pebbles cereal boxes as part of a promotional partnership between Post Foods and WWE.

"It's been a lifelong dream to be on a cereal box and I'm proud to represent WWE as part of our partnership with Post," Cena said in a statement. "I'm looking forward to joining millions of families at their breakfast table across the country."