Sydney Sweeney is charging through a fun 2026 without a care in the world ... and with a Wonder Woman costume that accentuated every curve.

The actress shared a series of photos and videos in a post Saturday she captioned "Camp '26" ... showing scenes from throughout her busy year with friends and her beau, Scooter Braun.

Two parts of the post really stick out ... one quite literally -- because Sydney's chest is basically busting out of her Wonder Woman top in one snap. Scooter posed beside her in a very realistic Superman costume.

In a video she shared, Sydney's also seen running through an obstacle course floating atop a lake ... before hopping on a jet ski and zooming around with her man. BTW, looks like Scooter got thrown off the ride at one point!

As you know ... Sydney and Scooter have been together for about a year now -- and they spend pretty much all their free time together.

The two were recently spotted enjoying a yacht day in Mallorca ... during which Sydney flashed her booty. It was a much-needed respite for the duo, who had volunteered at Second Harvest Food Bank in Washington State and organized donations for families impacted by the devastating wildfires a few weeks prior.

From doing superheroic deeds in good life to dressing the part ... it looks like Sydney and Scooter are having an awesome summer.