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Contrary to a new report, Leonardo DiCaprio and Bar Refaeli haven't split, a source close to the couple tells

"They are still together," the source says.

See what Leonardo DiCaprio -- and other stars -- look like as babies. reported the couple was "taking time off" -- a few hours after they were photographed shopping together at a Barnes & Noble in Hollywood.

See Hollywood's most romantic couples.

At the Young Hollywood Awards on Sunday, Refaeli, 23, dodged questions about her beau, 34. When asked by Us what makes their relationship work, she said: "Oh, I'm not going to get into that."

DiCaprio and the Sports Illustrated model took a brief break last fall, but reconciled in December and have been together ever since.

See photos of couples who break up and make up.

In March, rumors surfaced they tied the knot, but a source told Us then: "[They] are not married and not engaged."