Robert Downey Jr has shared the first photo of his adorable five-month-old daughter Avri Roel.

The 50-year-old Iron Man actor and proud father showed off his new bundle of joy during a recent appearance on The Late Show With David Letterman.

He said: "I thought I would show the first picture on planet earth here with you, kind sir."

Downey Jr announced he was expecting his second child with his wife Susan back in July.

Taking to Twitter, he wrote: "Yo. Susan. Me. Baby. Girl. November. Scorpio?"

The couple, who have been married for almost nine years, are already parents to son Exton Elias, who was born in February 2012.

Downey Jr also has a 20-year-old son Indio from his first marriage.