Hibernian won at home for the first time since September as they proved too strong for Kilmarnock.
Craig Samson made several excellent saves to keep out Terry Butcher's Hibs.
He kept out a Jason Cummings strike, tipped Scott Robertson's header on to the bar and parried a Lewis Stevenson shot.
But he had no answer to Hanlon's 12th-minute header from Paul Cairney's corner and eventually was beaten by Cairney's curler and a Stevenson shot.
A minute's silence was held before kick-off as both teams paid tribute to
Hibernian youth player David Paul,
who died seven days ago.
Both Butcher and Allan Johnston kept faith with the starting line-ups that brought about victories against Ross County and Hearts respectively on Boxing Day.
The home side were first to have a crack at goal. Collins peeled away from the Killie defence but fired his left-foot effort wide of the target.
Teenager Cummings was next to try his luck as he drove through the middle of the visitors but his shot was well saved by Samson.
The pressure paid off when defender Hanlon met Cairney's cross to head home his first goal of the season.
It was Hibs' third goal in succession from a corner kick following their 2-0 win over County three days ago.
Hibs continued to create chances with Liam Craig and Robertson winning the midfield battle against their Ayrshire counterparts.
Indeed, Robertson went close when his header was knocked on to the bar by the impressive Samson.
And Craig played in Stevenson on the angle 12 yards out but his strike on goal was brilliantly tipped away by the visiting goalie.
And Samson was called into action again when Cairney sent in a terrific cross that was net-bound, only for Samson to palm the ball away to safety.
The Hibs fans inside Easter Road were enjoying watching their side, who looked sharp and were creating a series of chances.
In a rare venture forward Kris Boyd found space on the edge of the 18 yard box but Ben Williams was equal to the task and saved with ease.
Referee Willie Collum then waved away Hibs' claims for a penalty when Cairney went down inside the box after a challenge by Manuel Pascali.
Craig found himself in the referee's book after pulling down Chris Johnston as he drove towards the Hibs goal.
Kilmarnock were beginning to come into the game and Boyd set up Michael Gardyne 20 yards out but his shot hit the side netting.
Hibs began the second period the way they opened up the game. Stevenson again tried his luck from 14 yards out on the angle but again Samson came to Killie's rescue.
The quality of balls into the box from Hibernian were excellent all afternoon with Cairney, Craig and Stevenson all sending in testing crosses that Samson did well to punch clear of the danger area.
Stevenson recently made his 200th appearance for the Easter Road side and he came within inches of finding the target for the first time this season with a terrific right-foot shot from 16 yards.
And with 13 minutes left Hibs wrapped up the victory as the Killie defence struggled to deal with a cross into the box and Cairney swept in a left-foot shot into the bottom corner of the goal.
It was the least the home side deserved after dominating the game.
Robertson came close to adding a third but his effort from 16 yards ended up in the side netting.
Deep into stoppage time Hibs made it three when Stevenson crowned off a terrific performance with a fine goal from 25 yards.
Hibernian 01 Williams 23 Forster 03 McGivern 08 Robertson 05 Nelson 04 Hanlon 11 Cairney (Tudur Jones - 86' ) 10 Craig Booked 35 Cummings (Handling - 73' ) 14 Collins 16 Stevenson Substitutes 17 Tudur Jones 18 Maybury 19 Handling 21 Murdoch 26 Stanton 27 Zoubir 29 Caldwell Kilmarnock 01 Samson 16 Clohessy 02 Tesselaar 28 Slater 30 Ashcroft 29 Pascali 18 McKenzie 05 Irvine 09 Boyd 25 Gardyne (Winchester - 60' ) 10 Johnston Substitutes 07 Nicholson 08 Clingan 11 Gros 12 Reguero 21 Winchester 23 McKeown 33 Muirhead
Ref: William Collum