Kate Beckinsale

The "Underworld" star is now 43 years old, but she has an 18-year-old daughter. Beckinsale is one the youngest moms (as per the industry standards) in Hollywood. She gave birth to her only daughter, Lilly Mo Sheen, in 1999, while she was in a relationship with her former boyfriend, Michael Sheen. Kate Beckinsale married the "Underworld" movie series director, Len Wiseman, in 2004. The couple parted ways in 2016. The Hollywood pair didn't have kids together. Kate Beckinsale, apparently, is too sexy to be ignored! She rightly deserves a place on this list.