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Taylor Swift just starred in the most purrrrrfect advertisement, but she may now have some stiff competition when it comes to whose the biggest star in her household!

An unabashed cat lover, the "Shake It Off" singer is featured in a new Diet Coke commercial that has hit the web. But the true star of the commercial is up for debate, as it appears Taylor's beloved cat, Olivia Benson, steals the show.

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The ad shows Taylor sitting in her glamorous apartment wielding a Diet Coke in one hand and a string in the other. As she plays with Olivia and the string, more and more cats begin to appear.

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In essence, it's Taylor Swift's perfect world. On Wednesday, she tweeted the clip with the caption, "Behold, the Diet Coke ad that depicts my perfect world. Featuring a new song and Olivia, who is now a cat actress."

This isn't the first time Olivia has been featured in an ad. Earlier this month, the feline starred in a Keds sneaker ad. Someone get this kitty an agent!

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As Taylor hinted, fans of the singer were surprised with a new song from the country darling. In the ad, a tune from her upcoming album "1989" provides the soundtrack.

See what Taylor Swift's "perfect world" looks like here!