Automapper automatically resolve correct subclass to map to?

Given the following source types:

public class BaseViewModel
{
   public string Prop1 { get; set; }
}

public class FirstViewModelImpl : BaseViewModel
{
   public string Prop2 { get; set; } 
}

public class SecondViewModelImpl : BaseViewModel
{
   public string AnotherProp { get; set; }
}

And the following destination types

public class BaseDto
{
   public string Prop1 { get; set; }
}

public class FirstDtoImpl : BaseDto
{
   public string Prop2 { get; set; } 
}

public class SecondDtoImpl : BaseViewModel
{
   public string AnotherProp { get; set; }
}

With the following mappings:

Mapper.CreateMap<FirstViewModelImpl,FirstDtoImpl>();
Mapper.CreateMap<SecondViewModelImpl,SecondDtoImpl>();

Can I do the following (trivial example) - given that I don't actually know the type of viewmodel until runtime?

BaseViewModel myViewModel = GetAViewModelFromSomewhere();
FirstDtoImpl dto = (FirstDtoImpl)Mapper.Map<BaseViewModel,BaseDto>(myViewModel);

I am trying this out now anyway!