[ruby] Ruby Regexp group matching, assign variables on 1 line

I'm currently trying to rexp a string into multiple variables. Example string:

ryan_string = "RyanOnRails: This is a test"

I've matched it with this regexp, with 3 groups:

ryan_group = ryan_string.scan(/(^.*)(:)(.*)/i)

Now to access each group I have to do something like this:

ryan_group[0][0] (first group) RyanOnRails
ryan_group[0][1] (second group) :
ryan_group[0][2] (third group) This is a test

This seems pretty ridiculous and it feels like I'm doing something wrong. I would be expect to be able to do something like this:

g1, g2, g3 = ryan_string.scan(/(^.*)(:)(.*)/i)

Is this possible? Or is there a better way than how I'm doing it?