Miley Cyrus' model ex and the Twilight star took in the attractions on Sunday night, while walking around hand in hand.

The rollercoaster fans were spotted riding the Boomerang, Supreme Scream, Silver Bullet, and the Xcelerator, and even the usually-glum Stewart couldn't help but smile as she wandered through the park sipping beer with her latest lady love.

Stewart and Maxwell, who are both 26, officially started dating last month (Dec16), according to People.

The Twilight star dated musician St. Vincent for much of 2016 after splitting from French singer Soto and her former assistant Alicia Cargyle.

Her new girlfriend, Stella, is Maxim magazine's reigning hottest woman on the planet.

Stewart and her ex, St. Vincent, are still tied professionally - the musician composed the score for the actress' directorial debut Come Swim, which premiered at the Sundance Film Festival in Utah earlier this month (Jan17).

St. Vincent, real name Annie Clark, was also at the festival promoting her new horror movie, The Birthday Party.