Charlize Theron Heats Up Mexican Beach Ahead of New Year’s Eve

Charlize Theron is heating things up down in Mexico ahead of the New Year … enjoying some fun in the sun in a jaw-dropping black swimsuit.

Check it out … the actress looked practically ageless as she donned a strapless one-piece bathing suit while abroad with her family south of the border Saturday.

She tried to keep a low profile, choosing to wear her platinum blonde locks — featuring brunette peekaboo highlights — up in a messy bun. Theron wore classic, black cat-eye shades and a beige fedora … which perfectly rounded out her beach bombshell aesthetic.

Charlize went down to the water with one of her daughters to get a feel for the sand and surf … skipping rocks across the calm blue sea.

It’s rare time off for the perpetually busy actress-producer … who has quite a few movies on the way — including a recently revealed part in Christopher Nolan‘s next flick.

Theron was among the first wave of casting announcements … along with Zendaya, Matt Damon, Tom Holland, Anne Hathaway, Robert Pattinson and Lupita Nyong’o.