Leonardo DiCaprio's Hair

The Cut:
This is another modified "Ivy League" cut. It has the characteristics of short tapering on the back and sides, progressing to longer lengths at the top of the head as you approach the bangs area.
In this case, you want the fringe/top lengths to be significant (from 5-6 inches or longer). Cut the perimeter following the traditional men’s cut pattern. Taper up the sides and back at a sharp angle to allow for fullness in the top and crown areas.

After shampooing and conditioning, spray the hair with leave-in conditioner and a styling product. Use your blow-dryer to dry the hair, directing the airflow slightly upward and toward the back of the head as you go. Use a round brush to direct the hair back, drying it to a mostly dry state.
At this point, use a small amount of smoothing serum on your fingers and palms and spread it evenly through the hair. Finish the style using a wide-tooth comb to create a clean look and let it finish drying naturally.
©Hairfinder.com
See also:
Male celebrity hairstyles
Hair inspiration for men