Is The actor that played Lilo from and Stitch same the episodes?

You're asking about Lilo from the animated series *Lilo & Stitch*. The answer is no.

* Lilo Pelekai was voiced by Daveigh Chase in the original movie *Lilo & Stitch* (2002) and all subsequent films and television series.

So while there are many episodes, it's always Daveigh Chase voicing Lilo.