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Reese Witherspoon isn't letting her growing baby bump slow her down!

The Oscar winner was on the tennis court at The Brentwood Country Club on Wednesday afternoon for a private lesson, and she rubbed her big belly the entire time.

The The Means War star is determined not to pack on the baby weight, and she's been keeping very active throughout her third pregnancy by hiking, jogging and working one-one-one with a personal trainer

Reese is reportedly due in late August or early September, but she still has yet to confirm the happy news!