Heathrow to Central London

Looking to take the Tube from Heathrow to Leicester Sq, Covent Garden or Picadilly Circus. It is not clear from the map on the Tube website (can't make out the different colours) whether these stations are on the line from Heathrow (is it the Picadilly line?).

Can anybody let me know please?

How long would it take to get from LHR to any of these stations?

Sim

Yep all three are on the Picadilly line, it would take about 25-30 mins from heathrow, more during peak times