Alien is starring Yaphet KottoYaphet Kotto starred in Witless ProtectionWitless Protection is starring Joe Mantegna
[Human]: Could you recommend movies similar to Alien? [Assistant]: Sure, do you like it because Yaphet Kotto and Tom Skerritt star in it? [Human]: Yes! Yaphet Kotto also starred in Witless Protection 
Yes, Joe Mantegna and Ivana Milicevic are in  that also, do you like their movies?