Credit: Kevin Mazur/WireImage

Comeback queen!

Catherine Zeta-Jones reminded the world why she's a star as a presenter at Sunday's Tony Awards in NYC.

It was the Oscar- and Tony-winning actress' first appearances since mid-April, when she briefly checked into a mental health facility, seeking treatment for Bipolar II disorder.

Handing out two trophies -- for best actor in a leading role in a play (Mark Rylance, Jerusalem) and in a musical (Norbert Leo Butz, Catch Me If You Can) -- the Welsh beauty, 41, dazzled in a curve-hugging red, sequined Elie Saab gown and jewels by van Cleef and Arpels.

The mom of two kids with husband Michael Douglas, Jones' mental health battle came on the heels of Douglas' own fight with stage-four throat cancer.

"She's great!" Douglas, 66, told Us Weekly last Thursday of his wife, who's been shooting rock musical Rock of Ages in Miami with Julianne Hough, Tom Cruise, Russell Brand, Alec Baldwin, Malin Akerman and Mary J. Blige.

"She's doing a great job."