1/3 © Getty Images

Meghan's mom Doria, who is a first time grandmother, is "overjoyed" with the arrival of her new grandson. 

2/3 © Getty Images

Doria was at Meghan's side on the eve of her royal wedding in May 2018, above, and was there when her daughter gave birth to her first baby

3/3 © Getty Images

Doria, who was the only family member from Meghan's side at the royal wedding, arrived in Windsor from Los Angeles last month to get ready for the big arrival.

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