Alec Baldwin Teaches Boy Trump Impersonation ... And It's 'SO FANTASTIC!'

3/21/2017 4:04 PM PDT

Alec Baldwin Teaches Boy Donald Trump Impersonation

Alec Baldwin's got his Donald Trump replacement lined up if 'SNL' ever needs one ... and he's just great, so great!!!

Alec teaches a young boy his hilarious impression of the prez. The kid -- a kid reporter, we think -- scored when he got Alec to demonstrate at the star's premiere of his new flick, "Boss Baby."

Watch and learn.