When did your LO start holding their head up all the time?

💙 • Married, Mommy to 1 + 1 on the way 💗

My LO is 9 weeks old and will hold his head up for 8 seconds max at times and then is back down. But I’m seeing all these people posting videos of their babies holding their head up completely on their own. When did your LO start holding their head up?