Piers Morgan, who left his TV job due to Meghan Markle, praised Kate Middleton after the birthday portrait of the Duchess was released on Sunday.
The high-profile TV personality shared Kate's photo on his Twitter account and wrote, "Happy 40th Kate, You're a wonderful asset to The Royal Family."
His tweet came a day after hinting that he would target Prince Harry and Meghan Markle upon his return to the media.
Piers Morgan is launching his weekly column at The Sun. In a video shared two days ago on Twitter, he said, "Narcissistic celebrities, hypocritical politicians, virtue-signalling junior members of the Royal family... your worst nightmare I'm afraid. I'm back!."
His announcement was seen as a cryptic message to the US-based royal couple.