The actress, who plays Fiz in the ITV soap, wore a little yellow dress to the glitzy evening held at the Hackney Empire in London on Saturday, 24 May.
Jennie was all smiles as she posed for photographers on the red carpet – and no wonder why!
Just three days earlier she'd announced that she and long-time partner Chris are expecting their first child together.
In a tweet to fans on 21 May, she said: "We have some news to share. Chris and I are expecting an addition to our family. Very happy x."
She hasn't revealed any further information.
Among those who congratulated her were co-stars Jack P Shepherd and Michelle Keegan. The latter said: "Arghhhhhhhhhhhhhh JEN!!!!!! SO SO excited for u!! Congratulations! Amazing news!!!!!! x."
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