The 37-year-old has boosted her personal wardrobe with costumes intended for her alter ego, but still harbours "envy" for some of the items provided for her co-stars.
"I steal quite a lot of her things!" she confessed to PA. "There's a hair grip I wore for Laurel (Charlotte Bellamy) and Ashley's (John Middleton) wedding vow renewal recently which I liked, so I took that. It's really nice. I have wardrobe envy over Laurel's clothes as well."
Wheeler added that there are still downsides to her Emmerdale role as well, such as when the child actress playing Nicola's daughter Angelica plays up on set.
"Little Rebecca keeps me on my toes as she doesn't always do what's in the script!" she revealed. "I was with Charlotte in the cafe, and in the middle of a scene Rebecca asked for cake - so we had to ad-lib and continue the scene. Rebecca is two-and-a-half now so she's very chatty indeed."
Wheeler previously said she was happy to see "the old hard Nicola" make a comeback in recent times.
> 'Emmerdale' couple to be hit by 'blast from the past' Get the Inside Soap magazine on your iPhone or iPad