Interesting connection between the TED talk and the movie

Hi everyone! As we all know, Guy Pearce plays Peter Wetland in Prometheus (year 2073) ...However, he also plays Peter Weyland in the TED talk (2023)... the viral site says that he was born in 2000, so, he is 23 years old in the TED talk, and 73 years old in Prometheus...and he is played by the same person in both? Is it a mistake...or something proposital to make us think...?