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Julianne Hough stepped out for an afternoon stroll with her sexy man Ryan Seacrest in Miami. Love the 5 o'clock shadow, Ry!

The Rock of Ages hottie has been busy with her non-stop filming schedule ... including some hot and heavy makeout sessions with delicious co-star Diego Boneta. Good thing her media mogul beau is cool with her onscreen work.

This couple certainly know the importance of fitness. We've seen Julianne's smokin' hot bikini bod, but we have to say Mr. Seacrest looks mighty fine in his tight tee!

See more of titillating twosome ... after the jump.