Star Trek actor James Doohan - famed for his portrayal of "Beam Me Up" Scotty, the intrepid engineer who kept the starship Enterprise warping across galaxies - grinned and waved to fans Tuesday as he received a star on the Hollywood Walk of Fame.

It was expected to be the last public appearance of the 84-year-old performer, who was recently diagnosed with Alzheimer's disease and suffers from Parkinson's disease, diabetes and lung fibrosis.

The ceremony on Hollywood Boulevard was the culmination of several days of farewell activities that brought Doohan back into contact with longtime fans.

George Takei, who played Sulu on Star Trek, told the crowd: "This is a galactic day in this town full of stars."