US First Lady Melania Trump dazzled in a sequined black suit at her husband Donald Trump's first joint address to Congress here.

Melania Trump was seen wearing a jacket, which retails for $4,995, with a matching skirt worth $4,595, from Michael Kors' Spring 2017 collection, the New York Daily News reported.

It is the third time the First Lady has worn the New York City-based designer to a prominent event.

Last month, she wore wide-legged white Michael Kors pants, paired with a black blouse and black wool coat to meet Japan's Prime Minister Shinzo Abe and his wife Akie.

On Election Day, Melania Trump wore a white Michael Kors dress under a Balmain coat.

The repeat comes after a number of designers refused to dress the First Lady.

"I have no interest whatsoever in dressing Melania Trump," Marc Jacobs told Women's Wear Daily in November.