In reality
Definition 1 of 1
Pro Tip 1/3Contrast Clarifier
Use 'in reality' to clarify a contrast between appearances or beliefs and actual facts. 
He seems cheerful, but in reality, he's dealing with a lot of stress.
Pro Tip 2/3Illusion Breaker
'In reality' can be used to correct a false image or misconception someone may have. 
In reality, what you see on social media is not how people live every day.
Pro Tip 3/3Myth Dispelling
It's helpful for refuting myths or widely held illusions with factual evidence. 
Many believe in the glamour of being a CEO, but in reality, it's a lot of hard work and stress.