Don Lemon has set the world of Twitter alight by wearing a sexy black turtleneck for his Wednesday Tonight show.

While many fans swooned, others joked the 51-year-old looked anything from the Anchorman's Ron Burgundy or a jazz flutist, to the suave Leon Phelps from Ladies Man.

Lemon even got in on the joke, tweeting that 'I did east a fish sandwich today'.

Don Lemon has set the world of Twitter alight after he wore a sexy black turtleneck for his Wednesday Tonight show

He donned the turtleneck and grey blazer for his Wednesday Tonight show

The line is a reference to the Ladies Man's characters' notoriously bad relationship advice such as when introducing oneself to a woman, 'say something classy like.... Hey baby can I buy you a fish sandwich?'

Others commented on how 'handsome' the anchor was looking that evening in his '70s throwback'.

'Loving Dom Lemon's deep intellectual brother look tonight,' another Twitter user wrote.

Mark Spalding joked that Lemon looked like he'd just come from a book club meeting.

Lemon, who finished the 1970s look with a grey blazer on Wednesday, started his career at CNN in 2006 as a correspondent and has won an Edward R. Murrow award for his coverage of the capture of the Washington, D.C. snipers alongside several Emmy Awards.

The 51-year-old earned a degree in broadcast journalism from Brooklyn College and also attended Louisiana State University.