Kelly Osbourne told people on Instagram about her return to work in a message.
She just started working again for the first time since her son Sidney was born.
Kelly said she now had a lot more respect for moms who work.
She said it was hard to leave him because she missed him.
The TV star, on the other hand, brought her baby to work with her on her second day.
When Sidney was born, she made her mother Sharon Osbourne a grandmother for the fifth time.
Sharon told everyone the good news and told them the name and gender of her grandson.
Regrettably, the 38-year-old sent a message disagreeing with her mother.
She didn't name anyone but wrote that she wasn't ready to share her son.