Pie chart inside a donut chart

I have a donut chart with 2 series.  Is it possible to set the innermost series of the donut chart to be a pie chart instead?  As in, I want the middle of the donut chart to be filled in.  When I set the first series to have type: 'pie' and the second series to have type: 'donut', only the first series is rendered. 

Thanks,

Michelle