Hearts have a very good youth policy and talents like Lee Wallace are another year on.
Kello replaced the injured Janos Balogh in goal and Lee Wallace and David Obua were also restored to the starting line-up.
Lee Wallace created Hearts' only good chance of the first half when his left-foot strike tipped round the post by Graeme Smith.
New signing Andy Webster made his second debut for the visitors, replacing Ismael Bouzid, while Lee Wallace came in for Adrian Mrowiec.
Further cautions were issued to Dundee United's Morgaro Gomis and Hearts' Lee Wallace, the latter following the foul that led to the home side's opener.
"The people on the pitch have to take the responsibility, " the Hearts defender Lee Wallace, who earned his second cap from the bench, told BBC Scotland.
"Having worked with Paul Dixon and Lee Wallace, we're looking for someone to establish themselves as a permanent left back for the national team, " he said.
Elliot then gave the home side the lead in on 28 minutes, racing in front of David Lilley to direct Lee Wallace's cross in at the near-post.
"There are a few people perhaps that require or deserve the recognition: Andrew Driver, Lee Wallace, Eggert Jonsson, both Thomsons (Jason and Craig), Arvydas Novikovas, David Templeton, and Scott Robinson, " he said.
Midfielder Eggert Jonsson had been drafted into the heart of the home defence in place of the suspended Marius Zaliukas, with Jason Thomson replacing Lee Wallace, following the double sending off in last weekend's defeat by Aberdeen.
"Lee is a good and professional player but we talk about Barr before and why he would like to come here because he's sees the chance to improve - with Lee Wallace it is the same, " added Laszlo.
Suso sent a 20-yard drive off the outside of the upright, but Celtic immediately broke upfield and took the lead as they breached a defence in which midfielder Ruben Palazuelos was deputising at left-back for the injured Lee Wallace.
Celtic's claims for a penalty were waved away in the dying minutes when substitute Niall McGinn went down inside the box under a challenge from Lee Wallace, but referee Dougie McDonald consulted his assistant referee and signalled for a corner.
BBC: SPORT | Football | Scottish Premier | Celtic 2-1 Hearts
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