Johnny Galecki and Alaina Meyer would no longer be together,



Monday evening.

The 45-year-old

The Big Bang Theory

actor and the 23-year-old Meyer ended their relationship less than a year after the birth of their first child.

The two no longer share photos of them together since April.

According to sources, they have since split up and are dividing the custody of their son, who turns a year in December.

Galecki, who

played Leonard Hofstadter


The Big Bang Theory

, was in a relationship with Meyer in 2018. In May 2019 they announced that they were expecting a child.