Complex sentence: It starred Eric Christian Olsen, Jesse Eisenberg, and Anne Hathaway in very early roles, as the older siblings to the central character of the series, youngest child, Kenny (Jesse Eisenberg).
Split into simpler sentences: It starred Eric Christian Olsen, Jesse Eisenberg, and Anne Hathaway in very early roles. Hathaway and Olsen portrayed the older siblings to the central character of the series, youngest child, Kenny (Eisenberg).