Complex sentence: When he encounters the Tatums, Josh meets his double as well as two beautiful country cousins, Azalea and Selena (Yvonne Craig and Pam Austin, respectively), both compete to win Josh's affections.
Split into simpler sentences: When he encounters the Tatums, Josh meets his double as well as two beautiful country cousins, Azalea and Selena. The two girls, played by Yvonne Craig and Pam Austin respectively, both compete to win Josh's affections.