Sources say the on-again, off-again lovebirds stepped out for a quiet movie date at the Odeon Cinema in London on Tuesday.
They reportedly saw Sex Tape, the comedy starring Cameron Diaz and Jason Segel - and the next night, Cressida was said to be one of the guests helping Harry celebrate the big 3-0 in a ski-themed bash at Clarence House.
Could this be a sign the pair are giving love another chance? The former couple dated for two years before breaking up in April, with the pressure of dating in the public eye reportedly playing a part in their split.
Now, however, it seems the couple are back on form - which could put an end to the rumours linking Prince Harry to Camilla Thurlow, the former beauty pageant queen who now works for the HALO Trust charity, a favourite of Princess Diana's.