Accessing element in templated column by name?

Question

Assumning a datagrid with a templated column, like so...

    <data:DataGridTemplateColumn Header="Birthday">
        <data:DataGridTemplateColumn.CellTemplate>
            <DataTemplate>
                <TextBlock x:Name="Foo" Text="{Binding Birthday}" Margin="4"/>
            </DataTemplate>
        </data:DataGridTemplateColumn.CellTemplate>
    </data:DataGridTemplateColumn>

Is it possible to access the TextBlock by name?