Suri's Day With the Grandparents

Suri with Katie's parents, Martin & Kathleen Holmes, in Berlin on Sept. 21. (WENN)

Even though her parents are world-famous superstars Tom Cruise and Katie Holmes, little Suri Cruise still occasionally likes to enjoy the company of some more mature folks; the kind who don't jump up and down on Oprah's couch.

Earlier today, the adorable 16-month-old went for a stroll through Berlin's Tiergarten park with Katie's parents, Martin and Kathleen. The trio stopped at a playground, where little Suri enjoyed herself immensely.

"Martin and Kathleen obviously adore that child," one onlooker tells OK!. "How could they not? She looks just like Katie did when she was a baby!"

The TomKat crew have been living in Berlin for several weeks, where Tom is filming the WWII film Rubicon (formerly called Valkyrie). In addition to having several floors of their hotel renovated to suit their familial needs, Tom has been known to shut down production on the set in order to have some private playtime with his daughter.