[Thengise Greenleaf of Mirkwood]

Yes, but he cannot be that young. In the appendexes of the Return of the King i read that an elf looks a year older after 144 years even thought they are immortal. So if Legolas was arond 3-5hundred years old he should only appear to be 3-4 years old. The movie guide said he was 2,931 which i find more believable because if you divided that by 144 he should appear to be around 20, which he does.