Victoria's Secret model Lily Aldridge is starting to show!

The gorgeous gal and her husband, Kings of Leon frontman Caleb Followill, stepped out on the red carpet together last night for the premiere of HBO's "Eastbound & Down" -- where she debuted her baby bump.

This will be the first child for the 29-year-old model and her musician man, who tied the knot back in May 2011.

Lily was 3 months along when she announced her pregnancy at the end of December.

She is one of two Victoria's Secret models currently expecting. Alessandra Ambrosio is also pregnant.

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