GREP Expression

Not sure if there is a subforum for this... I have studied some GREP but i am not sure what to do here.

Basically I want to apply a grep in my Body Copy paragraph style that looks for the word and number Figure 1.1 or Figure 1.2 so on and apply a Character style so that its a formated so it stands out.  The GREP has to account for the fact that the number variable could change maybe 1.12 or 2.14 up to 9.99. I don't think i will have more then double digits after the decimal.

Thanks for your help!