When it's time to move on, Katie Couric knows it. After five years together, Couric and entrepreneur Brooks Perlin have decided to go their separate ways.

The former CBS Evening News anchor met Perlin, 37, in 2006 during a fundraiser for cancer research at the Louis Licari Hair Salon. Couric's husband Jay Monahan died from colon cancer in 1998; she has two daughters — Ellie, 20, and Carrie, 15.

Apparently Couric was the ready to move on, and now Perlin is moving out of her New York City townhouse. "Brook's a nice guy, but it was inevitable because they had different priorities and perspectives, and their age difference made it a challenge, too," a source told Us Weekly.

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