AceShowbiz -

Robert Downey Jr. put his celebrity status to good use by dressing up as Winnie the Pooh's best bud Tigger to cheer up a sick boy named Daniel who has cystic fibrosis. The Oscar-nominated actor uploaded on his Instagram over the weekend a photo of himself wearing an orange and yellow tiger costume and crouching down as if he were bouncing on his tail like the character, and put up his paws. He posed barefoot on grass and wore aviator sunglasses.

"Mr. Stark here. This is for Daniel (@envy_coatings) who was having a rough day recently," the 50-year-old actor captioned the snapshot. "When I'm in the dumps, I've found this little getup to be helpful." He then continued writing, "P.S. Would you like to come to the LA premiere of 'Captain America: Civil War' as my guest? If so, have your people call my people. All the best."

Mr. Stark here. This is for Daniel (@envy_coatings) who was having a rough day recently. When I’m in the dumps, I’ve found this little getup to be helpful. P.S. Would you like to come to the LA premiere of Captain America: Civil War as my guest? If so, have your people call my people. All the best.

A photo posted by Robert Downey Jr. (@robertdowneyjr) on Oct 23, 2015 at 6:05pm PDT

Downey Jr.'s heartwarming gesture came after Daniel's mom reached out to him via Instagram, detailing on the 7-year-old boy's condition and difficult life with cystic fibrosis. Daniel's mum (@envy_coatings) used Instagram to contact the "Iron Man" star to get a "little lift" for her little boy after he was bullied at school.

#cysticfibrosis #myironman #bulliescanthurtme @robertdowneyjr This is my son Daniel and he has cystic fibrosis, he is seven years old and wants nothing more to meet his idol Robert Downey Jr (aka iron man) as he has managed to get past the bullies he faces from day to day by telling them the he too has a extra special port in his chest much like iron man has his arc reactor, I am sharing this in hope that mr stark (as Daniel calls him out of the suit) could find a way to contact me on here as Daniel could really do with a little lift at the moment after a child at school has told him that all children with cf die. If this reaches him and Daniel could get a reply I hope that it could help him through his stay in hospital as it is starting to take its toll on him.

A photo posted by Vicky Keyte (@envy_coatings) on Oct 18, 2015 at 11:54am PDT