Is it possible to do both a hair line brow lift and forehead reduction at the same time?

Absolutely.  The incision would be along the hairline, and both can be accomplished at the same time. Kenneth Hughes, MDLos Angeles, CA

YES, through a hairline incision (pretrichial), both the brows can be lifted and the hairline can be lowered.  In fact, that is one of the advantages of using hairline incision for brow/forehead lift.