Unify this 2 querys that use 3 tables
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I am working in a group and group membership functionality

Tables relevant are:

> usuarios (id, first_name, last_name, ...)
> 
> groups (id, name, .. , id_user )
> 
> group_members (id, id_group, id_user)

With this Design i need to get the creator from the groups table (groups.id_user is the creator) and the members from the group_members (group_members.id_usuario)

Wich for now I have only been able to achieve with 2 querys:

    /* Retrieve members */
    $q = 'SELECT usuarios.id as uid, usuarios.avatar, usuarios.first_name,usuarios.last_name 
    	 		      FROM usuarios LEFT JOIN group_members ON usuarios.id = group_members.id_user
    	 			  WHERE group_members.id_group = '.$this->id.'';
    $r =  cache_query($q,'',10);
    /* Retrive creator */	 		
    $q2 = 'SELECT usuarios.id as uid, usuarios.avatar, usuarios.first_name,usuarios.last_name
    	 		       FROM usuarios LEFT JOIN groups ON usuarios.id = groups.id_user
    	 			   WHERE groups.id = '.$this->id;
    $r2 =  cache_query($q2,'',10);

Is there a way to achieve it with one single query? (i was thinking also just to insert the creator as a member and only use first query)