Louis Tomlinson didn't waste any time introducing his newborn son to fans!

On Wednesday, the 24-year-old shared the first photo of baby boy Freddie Reign, who was born on Jan. 21.

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Meet my little lad, Freddie 👶

A post shared by Louis Tomlinson (@louist91) on

A second pic of the infant quickly followed on mom Briana Jungwirth's Instagram account.

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1/21/16. Freddie Reign. Love of my life💙

A post shared by BRIANA JUNGWIRTH (@brianasrealaccount) on

The One Direction band member later took to Twitter to thank followers for their "nice messages."

The singer, who briefly dated Briana, a Los Angeles-based stylist, last year, happily announced the news of his first child's arrival last week, writing:

Congrats to the new parents! Scroll down to see more celebrity tots who made their debuts on social media!