Two former world champions will regularly be in the F1 paddock in 2019.

Nico Rosberg has been signed up to attend 10 grands prix for the German broadcaster RTL -- up two races compared to last year.

"To keep the connection to formula one means a lot to me," said the 2016 title winner.

Also in the paddocks this year will be 2009 world champion Jenson Button, who has been signed up as a pundit by Britain's Sky for the entire 21-race calendar.

"F1 is a sport I love, a sport I lived for 17 years and a sport I'm excited to help deliver to the fans," he said.