We’ll never forget Liz Lemon, but there are a few actors you forgot were on 30 Rock. We’ll be looking at the celebrity guest appearances on this TV comedy that you might have forgotten. This list will be exclusively for celebs whose role we somehow keep overlooking, meaning that Oprah’s unforgettable cameo is ineligible. MsMojo ranks the actors you forgot were on 30 Rock. Are there any 30 Rock actors we forgot? Let us know in the comments!