Examples:

• It's time for you to act your age and take responsibility for your actions.
• Stop acting like a child and start acting your age.
• I expect you to act your age and behave like an adult.
• Don't you think it's time to act your age and stop goofing around?
• She needs to act her age and stop being so reckless.
• I wish he would act his age and stop trying to relive his youth.
• It's embarrassing to see someone act below their age in a professional setting.
• We need to act our age and set a good example for our younger colleagues.
• Acting your age means being mature and responsible.
• When you act your age, people will take you more seriously.
• It's important to act your age when you're in a position of authority.
• Sometimes it's hard to act your age when you're having fun with friends.
• He needs to act his age and stop worrying about what others think of him.
• Acting your age can sometimes mean making tough decisions.
• She's always been mature for her age and knows how to act appropriately in different situations.
• The kids need to learn how to act their age and not talk back to adults.
• It's never too late to start acting your age and taking life more seriously.
• If you don't act your age, people may not trust you with important tasks or responsibilities.
• Acting your age can be a challenge, but it's an important part of growing up.
• It's time for us to act our age and start planning for the future.