Johnny Galecki and Kelli Garner are both single again.

Us Weekly writes that 'The Big Bang Theory' star and the former 'Pan-Am' actress have amicably split almost two years after first going public with their relationship in March of 2012.

Earlier in 2014, E! News reported that Galecki and Garner were spotted packing on some PDA while they were in Mexico attending Kelly Cuoco's wedding to Ryan Sweeting. Cuoco is Galecki's ex girlfriend and co-star on 'The Big Bang Theory.'

Speaking of 'The Big Bang Theory,' Galecki, Cuoco and Emmy winner Jim Parsons recently renegotiated their contracts, and the three stand to make upwards of $1 million dollars an episode. The show consistently ranks as one of the top comedies week after week.

The premiere of Season 8 of 'The Big Bang Theory' will air on Sept. 22, 2014.