Is it possible for a non-Jew to join Messianic Judaism?

For this question, I would like to first define that someone is a Jew if they meet the [halakhic definition](http://en.wikipedia.org/wiki/Who_is_a_Jew%3F#Halakhic_perspective) . This definition is just for the sake of moving the discussion toward an answer. --- Is it possible for a non-Jew to join [Messianic Judaism](http://en.wikipedia.org/wiki/Messianic_Judaism) ?