Quite a handful of LOTR castmembers can be seen on TMN today.

Elijah Wood (Frodo) in 'The Faculty' on TMN [More]

Ethan Hawke (Faramir) Uma Thurman (Eowyn, still rumored) in 'Gattaca' [More]

Ian McKellen (Gandalf) in 'Gods and Monsters' [More]