Kelly Rowland can"t stop smiling as she makes first appearance since secret wedding

Kelly Rowland has tied the knot. The singer secretly married her long-term boyfriend Tim Witherspoon in Costa Rica on 9 May — and on Monday made her first appearance as a married woman.

The singer glowed as she hit the red carpet at the American Ballet Theatre Spring Gala in New York following reports she wed Tim in a low-key ceremony on Friday.

Singer Kelly Rowland looked radiant as she stepped out for her first appearance since tying the knot

No doubt aware of all the wedding speculation, Kelly, 33, coyly kept her hand inside the pocket of her golden yellow sleeveless Lanvin dress, keeping her ring finger hidden from the cameras.

Nevertheless, numerous sources have confirmed that Kelly and Tim did marry during their recent holiday in Costa Rica.

“It was a quick, simple ceremony — only around 30 people,” a source told US Weekly.

Kelly Rowland married her fiancé Tim Witherspoon in a secret ceremony in Costa Rica over the weekend

Among those on hand to celebrate with the newlyweds were Beyoncé Knowles and her younger sister Solange Knowles, who flew out together for the nuptials following their now-infamous appearance at the Met Gala.

Kelly”s friend and former Destiny”s Child bandmate Beyoncé shared a photograph on Instagram on the day of the wedding, showing her wearing what appeared to be a bridesmaid”s dress. She simply captioned the snapshot: “Good morning.”

Former band mate Beyoncé was in attendance for the nuptials

Kelly confirmed her engagement to Tim in December during an appearance on The Queen Latifah Show.

“He put a ring on it,” she said. “It”s been a while. We”ve kept it very, very low – for years to be completely honest.”

The star also revealed that her long-term love popped the question over Skype. “It was so late — we were just staring at each other,” she revealed.