River-dad.

"Riverdale" star KJ Apa is expecting his first child with his girlfriend, model Clara Berry, the couple announced on Instagram Wednesday.

Apa, 23, posted a picture of the two comfortably couch-bound with Berry’s top rolled up over her pregnant belly, while Berry, 27, confirmed things with a post on her own Instagram page, with Apa tagged directly over her baby bump.

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KJ Apa revealed he's expecting his first child with Clara Berry.

KJ Apa revealed he's expecting his first child with Clara Berry. (Axelle/Bauer-Griffin/FilmMagic)

For those unable to pick up on context clues, Apa commented, "she’s pregnant btw," to which Berry responded, "We are."

Apa’s "Riverdale" co-star Lili Reinhart was among those sending congratulations, expressing them via heart emojis.

Apa confirmed he was dating Berry in February 2020. This is, barring any Schwarzenegger-esque secret families, the first child for either of them.

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The pregnancy announcement is considerably better news for Apa than the last time he appeared on Page Six, in the summer of 2020, when he was posting about getting shards of metal in his eye and splitting his head open while filming the critically-drubbed Michael Bay COVID "thriller" "Songbird," which was released in December.

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Here’s hoping fatherhood won’t be as rough as filming — or watching — "Songbird."