Every baby is so different mine were 15 months, 11 months and 13 months. But I too was told by my pediatrician 18 months should be the latest.

Average is between 11 and 15 mo. You shouldn’t worry until 18 months.

My baby start walking at 10 months

My son wouldn’t do any steps on his own until he took off 2 weeks after his 1st bday