I feel like a dirty old lady for finding Pablo Espinosa so yummy, but he is gorgeous:
YouTube - La Pola Capítulo 01 4/5
YouTube - La Pola Capítulo 01 5/5

I kinda think he's better-looking than Emmanuel Esparza who is playing the grown-up Alejo. They did a great job casting these two though. They do look alike!
Love young Pola as well. She's adorably awesome.