While Denise Richards mourns her pet bulldog Hank - who died aged 13 on Sunday (Sunday 20, 2013) - fellow Jennifer Lopez is just getting to know her new addition to the family, a boxer dog named Frank. Richards - the ex-wife of Charlie Sheen - took to Twitter this week to express her sadness over the passing of lovable Hank.

"Last night we lost our beloved Hank," the actress wrote. "I will miss him dearly, 13 yrs old... been there for me thru it all Best dog ever & part of our family." Fortunately for the Hollywood actress, she recently adopted a rescue puppy, possibly acknowledging the fact that old Hank didn't have much left in the tank. Animal lover Richards also has many other pet cats to keep her company, and her three children of course! 

Meanwhile, Jennifer Lopez and Casper Smart are expanding their family with the arrival of a little brown boxer dog named Bear. Smart, 25, who works as a backing dancer for his high profile partner, tweeted the news last week, saying, "Introducing the new addition to the family..." before uploading a snap of the pooch. Lopez, a mother of 4-year-old twins Max and Emme with ex-husband Marc Anthony, re-tweeted the message, adding, "So happy! Lilbabybear. Could get confusing!" Bear is known as the couple's pet name for each other.

Denise Richards is currently shooting the TV movie Socio, about a charismatic 16-year-old alleged sociopath who reconnects with his best friends from childhood, and becomes the prime suspect in a murder investigation. 

Watch Denise Richards On The Set Of 30 Rock!