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Kirstie Alley is a grandma!

According to the the actress’ Twitter account, her son William True Stevenson has welcomed his first child.

The 65-year-old Alley made an official announcement via social media on Tuesday, June 21.

“When your son has a son…bliss,” she wrote of her 23 year-old son, pictured with the newborn. “Yes this is my secret happy news as promised …Welcome Waylon Tripp Parker.”

Then she posted the most adorable photo of the new bundle of joy.

Congratulations Kirstie!

Kamron Taylor |