Convert minute duration (string) to float

I am trying to convert my time watched in a netflix show to a float so I can total it up. I cannot figure out how to convert it. I have tried many ways, including:

temp['Minutes'] = temp['Duration'].apply(lambda x: float(x))

Error: ValueError: could not convert string to float: '00:54:45'

2022-05-18 05:21:42 00:54:45    NaN Ozark: Season 4: Mud (Episode 13)   NaN Amazon FTVET31DOVI2020 Smart TV 00:54:50    00:54:50    US (United States)  Wednesday   2022-05-18

I have pulled the day of week and Day out but I would like to plot it just for fun and think the minutes would be the best to add up over time.