One sharing billing with new actors (2-4)
I believe the answer is:
co-star
'one sharing billing' is the definition.
(someone sharing billing with other stars)
'new actors' is the wordplay.
'new' is an anagram indicator.
'actors' with letters rearranged gives 'CO-STAR'.
'with' is the link.
(Other definitions for co-star that I've seen before include "Fellow leading actor" , "Joint equal performer" , "One of two leading actors in play or film" , "Top performer with equal billing to another" , "Fellow protagonist" .)