Jessica Simpson and her father Joe Simpson on July 2, 2010 in White Sulphur Springs, West Virginia. Credit: Theo Wargo/

Joe Simpson is a proud new grandfather!

The father of Jessica Simpson has taken to his Twitter account to share his excitement over the birth of Jessica and Eric Johnson's first child, Maxwell Drew Johnson, Tuesday morning.

Grandpa Joe said his daughter always wanted to become a mother. 

"Jess dreamed since she was a young girl about being a mom," Joe shared Wednesday. "Dreams come true! So happy!"

On Tuesday, he Tweeted, "Proud PaPaJoe !! Beautiful baby girl... What a miracle!"

Jessica, 31, gave birth to her little miracle at an L.A. hospital with Johnson, 32, and their families by her side.

"We are so grateful for all of the love, support and prayers we have received," Simpson wrote on her website. "This has been the greatest experience of our lives!"