Actor Allusion/Web Comics

Examples of Actor Allusion in Web Comics include:

Two characters from Dan's junior high comics appear in a strip or two of El Goonish Shive. Subverted because all they do is point this fact out.
Darths and Droids has Chancellor Valorum as such an over-the-top Evil Chancellor that he yells "Kneel before Valorum!", as a reference to Zod from the Superman film. Both Chancellor Valorum and Zod were played by Terence Stamp, whom the authors felt "deserved some slightly more memorable lines." The "GM plans" also had Valorum originally named as "Zod".
- And again when one of the players recognizes Count Dooku's miniature as "That wizard from the fantasy campaign."
In a Concerned strip, Dr. Breen is seen reading a news paper and mentioning there is an I Spy marathon running that night. In Half-Life 2, Dr. Breen was voiced by Robert Culp, who played Kelly Robinson in I Spy.
Given how Friendship is Magic fan artist Egophiliac created the "ponies in socks" meme, naturally a pair show up in her Interactive Comic blog Moonstuck.