The character change was definitely wild for O’Brien.
Nonetheless, O’Brien made it work.
I just did it," the actor shared.

She certainly did her homework because the change was almost seamless.
O’Brien didn’t miss a beat in Theresa’s storyline including her look.
“Honestly, the wig was just a solution to a problem,” she stated.

The wig also protects O’Brien’s natural hair and is easy to don.
“I don’t have to run heat through my hair and product through my hair.
Put it on and boom, I’m Theresa,” she admitted.
To her, that solution “was the only thing that made sense.
And I do, I like it now, honestly.”
Which is good, as the fans have already warmed up to her.
We’re looking forward to seeing what antics the new Theresa will be up to!