Moon director Duncan confirmed the happy news on on Wednesday (10Feb15), exactly a month after the passing of his father on 10 January (16).

He shared a hand-drawn illustration of a baby with an umbilical cord protruding from its stomach and a speech bubble with the words 'I'm waiting' coming from its mouth.

Jones added the caption, "One month since dad died today. Made this card for him at Christmas. Due in June. Circle of life. Love you, granddad."

Duncan's child with his photographer wife Rodene Ronquillo would have been Bowie's first grandchild.

The moviemaker, who the only child from David's first marriage to ex-wife Angie, wed Rodene in 2012.

David was 69 when he passed away in New York City, following a secret 18-month battle with liver cancer.

Duncan also took to to confirm the sad news his father had died last month, and he returned to the microblogging site days after Bowie's death to share a tribute from a care physician, who revealed the rock star's private approach to his health struggle aided a dying patient he was assisting.

Jones also posted a thank you to fans and well wishers, adding, "Hi all. Just wanted to thank you for the incredibly kind words & thoughts. I'll be easing my way back into Twitter."