The former Emmerdale star has managed to drop four dress sizes in just as many weeks thanks to some energetic routines with pro partner Robin Windsor.
Lisa told The Sun newspaper: “I’ve not done Strictly to lose weight but with all the training it just falls off you.
“I was rehearsing the Viennese waltz and my trousers fell down.”
The newspaper reports that the team's wardrobe department have had trouble preparing outfits for the actress.
A source told the tabloid: “Practically every week there is an emergency job moments before she’s due to go on air – she’s like the incredible shrinking woman. We can’t take in frocks fast enough.”
Lisa added to the paper this morning: “I wanted to show it was OK for someone like me to do a competition like this – to dress in sexy clothes and have fun.”
This week Strictly Come Dancing is on Saturday 10th November at 6.30pm with the results show on Sunday 11th November at 7.25pm on BBC One and BBC One HD.