'Barbenheimer' fashion: Red carpet square-off between 'Barbie' and 'Oppenheimer'

Cillian Murphy (left) has even been dubbed as the "anti-Ken", in comparison to Ryan Gosling's style. Photo composite: AP, AFP

Two films and two sets of fans, but one release date of July 21. The internet phenomenon known as "Barbenheimer" really took off recently.

Oppenheimer and Barbie are at different ends of the spectrum when it comes to genre – with one being a serious biographical thriller and the other, a fun fantasy comedy.