Joining the cast of the musical Cats for the next 12 weeks, Nicole took to the stage at the London Palladium for her very first show.
And, supporting his girlfriend of six years, Lewis made sure to be sat in the audience cheering her on.
Following Nicole's performance, Lewis shared a photo of himself cosying up to his other half - who was still in full costume - along with a touching tribute.
He wrote: "Went to see the Cats musical for the first time last night, and my lady @nicolescherzy blew me away!
"Such an incredible talent she is, as well as the rest of the cast! #Grizabella #JellicleCats #CantGetThatSongOutOfMyHead #SoGood #NicoleIsAmazing #London #GoSeeIt."
On seeing his Instagram post, Nicole reposted Lewis' photo and said: "#regram Thanks so much for the love and support babe...purrrrrr @lewishamilton @catsmusical #Cats."
Back in September, Nicole announced she would be starring in Cats to play the role of Grizabella as the musical makes its West End return.
Speaking about her theatre debut, the former X Factor judge has previously said she was "thrilled" to be joining the cast and working with Andrew Lloyd Webber.
She said: "I am really thrilled to be making my West End debut in such an iconic show and I couldn't be more excited...
"I am truly honoured to have been asked to take part in what I know will be a very special time in my career."
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