Read Ryan Reynolds' subtle shout-out to his and Blake Lively's 4th baby

Once upon a time, Ryan Reynolds launched his latest show.

The Deadpool star, 46, recently revealed he's releasing a new series called Bedtime Stories with Ryan, and he gave a subtle shout-out to his fourth child with Blake Lively in the announcement.

"The idea for a show made to help everyone fall asleep was born the same day as my fourth child," Ryan wrote in a June 15 Instagram post alongside the trailer. "I can't wait for you to watch Bedtime Stories, premiering June 20th on @MaximumEffort Channel on @fubotv."

While Ryan and Blake never formally announced the arrival of their new baby, the Gossip Girl alum—who revealed the pregnancy last September—posted a picture of herself sans baby bump in February. And since then, Ryan has noted the couple—who are also parents to daughters James, 8; Inez, 6, and Betty, 3—are enjoying life as a family of six.

"We're very excited," he said on a February episode of CNBC's Power Lunch. "Look, we wouldn't do this four times if we didn't love it."

Blake and Ryan have yet to reveal the name or sex of their newest family member. However, the Free Guy actor did tell followers more about his new program.

As the name suggests, the series features Ryan telling bedtime stories to, per a press release, help "sooth your mind and soul (and also his own)."

"You know the best part about stories? You remember them. They stay with you," he said in the trailer. "And I want to tell you a bedtime story."