organic chemistry - α,β-unsaturated carbonyl compounds and alkyl addition

In my book it is suggested that in order to add alkyl groups in α,β-unsaturated carbonyl compounds we use organometallic reagents such as organolithium reagents. In the previous chapters it was suggested that the addition of alkyl groups in carbonyl compounds with saturated chains it is conducted by using secondary amines that produce enamines.

I would like to know if it is possible to add alkyl groups in α,β-unsaturated carbonyl compounds by using secondary amines.